15987792 has 40 divisors (see below), whose sum is σ = 41809824. Its totient is φ = 5263744.

The previous prime is 15987791. The next prime is 15987817. The reversal of 15987792 is 29778951.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15987791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1978 + ... + 5990.

Almost surely, 2^15987792 is an apocalyptic number.

15987792 is a gapful number since it is divisible by the number (12) 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 15987792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20904912).

15987792 is an abundant number, since it is smaller than the sum of its proper divisors (25822032).

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

15987792 is a wasteful number, since it uses less digits than its factorization.

15987792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107 (or 4101 counting only the distinct ones).

The product of its digits is 317520, while the sum is 48.

The square root of 15987792 is about 3998.4737088044. The cubic root of 15987792 is about 251.9201056883.

The spelling of 15987792 in words is "fifteen million, nine hundred eighty-seven thousand, seven hundred ninety-two".