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1397448 = 2332131493
BaseRepresentation
bin101010101001011001000
32121222221100
411111023020
5324204243
645541400
714610123
oct5251310
92558840
101397448
11874a18
12574860
1339c0c0
142853ba
151c90d3
hex1552c8

1397448 has 48 divisors (see below), whose sum is σ = 4078620. Its totient is φ = 429696.

The previous prime is 1397447. The next prime is 1397477. The reversal of 1397448 is 8447931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1397124 + 324 = 1182^2 + 18^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1397441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190 + ... + 1682.

21397448 is an apocalyptic number.

1397448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2039310).

1397448 is an abundant number, since it is smaller than the sum of its proper divisors (2681172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1397448 is a wasteful number, since it uses less digits than its factorization.

1397448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518 (or 1511 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1397448 is about 1182.1370478925. The cubic root of 1397448 is about 111.8008791932.

It can be divided in two parts, 13 and 97448, that added together give a triangular number (97461 = T441).

The spelling of 1397448 in words is "one million, three hundred ninety-seven thousand, four hundred forty-eight".

Divisors: 1 2 3 4 6 8 9 12 13 18 24 26 36 39 52 72 78 104 117 156 234 312 468 936 1493 2986 4479 5972 8958 11944 13437 17916 19409 26874 35832 38818 53748 58227 77636 107496 116454 155272 174681 232908 349362 465816 698724 1397448