15799664 has 40 divisors (see below), whose sum is σ = 33546960. Its totient is φ = 7175168.

The previous prime is 15799657. The next prime is 15799673. The reversal of 15799664 is 46699751.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6887 + ... + 8889.

It is an arithmetic number, because the mean of its divisors is an integer number (838674).

Almost surely, 2^15799664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15799664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16773480).

15799664 is an abundant number, since it is smaller than the sum of its proper divisors (17747296).

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

15799664 is a wasteful number, since it uses less digits than its factorization.

15799664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057 (or 2051 counting only the distinct ones).

The product of its digits is 408240, while the sum is 47.

The square root of 15799664 is about 3974.8791176588. The cubic root of 15799664 is about 250.9280916533.

The spelling of 15799664 in words is "fifteen million, seven hundred ninety-nine thousand, six hundred sixty-four".