1398880 has 48 divisors (see below), whose sum is σ = 3780000. Its totient is φ = 479232.

The previous prime is 1398871. The next prime is 1398911. The reversal of 1398880 is 888931.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496 + ... + 1744.

It is an arithmetic number, because the mean of its divisors is an integer number (78750).

2^1398880 is an apocalyptic number.

1398880 is a gapful number since it is divisible by the number (10) 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 1398880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1890000).

1398880 is an abundant number, since it is smaller than the sum of its proper divisors (2381120).

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

1398880 is a wasteful number, since it uses less digits than its factorization.

1398880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1263 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 1398880 is about 1182.7425755421. The cubic root of 1398880 is about 111.8390545444.

It can be divided in two parts, 1398 and 880, that added together give a triangular number (2278 = T₆₇).

The spelling of 1398880 in words is "one million, three hundred ninety-eight thousand, eight hundred eighty".