15798816 has 72 divisors (see below), whose sum is σ = 49022064. Its totient is φ = 4786560.

The previous prime is 15798803. The next prime is 15798821. The reversal of 15798816 is 61889751.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 675 + ... + 5661.

It is an arithmetic number, because the mean of its divisors is an integer number (680862).

Almost surely, 2^15798816 is an apocalyptic number.

15798816 is a gapful number since it is divisible by the number (16) 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 15798816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24511032).

15798816 is an abundant number, since it is smaller than the sum of its proper divisors (33223248).

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

15798816 is a wasteful number, since it uses less digits than its factorization.

15798816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5014 (or 5003 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 15798816 is about 3974.7724463169. The cubic root of 15798816 is about 250.9236022999.

The spelling of 15798816 in words is "fifteen million, seven hundred ninety-eight thousand, eight hundred sixteen".