15990960 has 40 divisors (see below), whose sum is σ = 49572720. Its totient is φ = 4264192.

The previous prime is 15990917. The next prime is 15990973. The reversal of 15990960 is 6909951.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 33075 + ... + 33554.

It is an arithmetic number, because the mean of its divisors is an integer number (1239318).

Almost surely, 2^15990960 is an apocalyptic number.

15990960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15990960 is an abundant number, since it is smaller than the sum of its proper divisors (33581760).

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

15990960 is a wasteful number, since it uses less digits than its factorization.

15990960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66645 (or 66639 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 15990960 is about 3998.8698403424. The cubic root of 15990960 is about 251.9367440122.

It can be divided in two parts, 159 and 90960, that added together give a palindrome (91119).

The spelling of 15990960 in words is "fifteen million, nine hundred ninety thousand, nine hundred sixty".