15980004 has 120 divisors (see below), whose sum is σ = 45317888. Its totient is φ = 4898880.

The previous prime is 15979981. The next prime is 15980011. The reversal of 15980004 is 40008951.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 15980004.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 371607 + ... + 371649.

Almost surely, 2^15980004 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 15980004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22658944).

15980004 is an abundant number, since it is smaller than the sum of its proper divisors (29337884).

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

15980004 is a wasteful number, since it uses less digits than its factorization.

15980004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 15980004 is about 3997.4997185741. The cubic root of 15980004 is about 251.8791937967.

Adding to 15980004 its reverse (40008951), we get a palindrome (55988955).

The spelling of 15980004 in words is "fifteen million, nine hundred eighty thousand, four".