15668004 has 48 divisors (see below), whose sum is σ = 41267520. Its totient is φ = 4583040.

The previous prime is 15667997. The next prime is 15668021. The reversal of 15668004 is 40086651.

15668004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1782 + ... + 5874.

It is an arithmetic number, because the mean of its divisors is an integer number (859740).

Almost surely, 2^15668004 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 15668004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20633760).

15668004 is an abundant number, since it is smaller than the sum of its proper divisors (25599516).

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

15668004 is a wasteful number, since it uses less digits than its factorization.

15668004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4140 (or 4138 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 15668004 is about 3958.2829610830. The cubic root of 15668004 is about 250.2291445736.

The spelling of 15668004 in words is "fifteen million, six hundred sixty-eight thousand, four".