15987960 has 96 divisors (see below), whose sum is σ = 52650000. Its totient is φ = 4207104.

The previous prime is 15987953. The next prime is 15987977. The reversal of 15987960 is 6978951.

It is a super-2 number, since 2×15987960² = 511229729923200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31791 + ... + 32289.

Almost surely, 2^15987960 is an apocalyptic number.

15987960 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 15987960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26325000).

15987960 is an abundant number, since it is smaller than the sum of its proper divisors (36662040).

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

15987960 is a wasteful number, since it uses less digits than its factorization.

15987960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 15987960 is about 3998.4947167653. The cubic root of 15987960 is about 251.9209880788.

Subtracting from 15987960 its reverse (6978951), we obtain a palindrome (9009009).

The spelling of 15987960 in words is "fifteen million, nine hundred eighty-seven thousand, nine hundred sixty".