15664002 has 16 divisors (see below), whose sum is σ = 32408640. Its totient is φ = 5041232.

The previous prime is 15663979. The next prime is 15664003. The reversal of 15664002 is 20046651.

It is not an unprimeable number, because it can be changed into a prime (15664003) by changing a digit.

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, 44838 + ... + 45185.

It is an arithmetic number, because the mean of its divisors is an integer number (2025540).

Almost surely, 2^15664002 is an apocalyptic number.

15664002 is an abundant number, since it is smaller than the sum of its proper divisors (16744638).

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

15664002 is a wasteful number, since it uses less digits than its factorization.

15664002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90057.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 15664002 is about 3957.7774065756. Note that the first 3 decimals coincide. The cubic root of 15664002 is about 250.2078378325.

The spelling of 15664002 in words is "fifteen million, six hundred sixty-four thousand, two".