15956940 has 96 divisors (see below), whose sum is σ = 48254976. Its totient is φ = 3928320.

The previous prime is 15956911. The next prime is 15956947. The reversal of 15956940 is 4965951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15956947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42594 + ... + 42966.

It is an arithmetic number, because the mean of its divisors is an integer number (502656).

Almost surely, 2^15956940 is an apocalyptic number.

15956940 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 15956940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24127488).

15956940 is an abundant number, since it is smaller than the sum of its proper divisors (32298036).

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

15956940 is a wasteful number, since it uses less digits than its factorization.

15956940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 15956940 is about 3994.6138737054. The cubic root of 15956940 is about 251.7579560538.

The spelling of 15956940 in words is "fifteen million, nine hundred fifty-six thousand, nine hundred forty".