15956880 has 80 divisors (see below), whose sum is σ = 52389504. Its totient is φ = 4003840.

The previous prime is 15956867. The next prime is 15956881. The reversal of 15956880 is 8865951.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15956881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2125 + ... + 6035.

Almost surely, 2^15956880 is an apocalyptic number.

15956880 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 15956880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26194752).

15956880 is an abundant number, since it is smaller than the sum of its proper divisors (36432624).

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

15956880 is a wasteful number, since it uses less digits than its factorization.

15956880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944 (or 3938 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 15956880 is about 3994.6063635858. The cubic root of 15956880 is about 251.7576405067.

Adding to 15956880 its product of nonzero digits (86400), we get a triangular number (16043280 = T₅₆₆₄).

It can be divided in two parts, 15956 and 880, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 15956880 in words is "fifteen million, nine hundred fifty-six thousand, eight hundred eighty".