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1381380 = 22357111323
BaseRepresentation
bin101010001010000000100
32121011220020
411101100010
5323201010
645335140
714512230
oct5212004
92534806
101381380
11863940
125674b0
133949b0
1427d5c0
151c4470
hex151404

1381380 has 192 divisors, whose sum is σ = 5419008. Its totient is φ = 253440.

The previous prime is 1381349. The next prime is 1381381. The reversal of 1381380 is 831831.

It is a self number, because there is not a number n which added to its sum of digits gives 1381380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381381) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60049 + ... + 60071.

It is an arithmetic number, because the mean of its divisors is an integer number (28224).

21381380 is an apocalyptic number.

1381380 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 1381380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2709504).

1381380 is an abundant number, since it is smaller than the sum of its proper divisors (4037628).

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

1381380 is a wasteful number, since it uses less digits than its factorization.

1381380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1381380 is about 1175.3212326849. The cubic root of 1381380 is about 111.3707269979.

The spelling of 1381380 in words is "one million, three hundred eighty-one thousand, three hundred eighty".