15997064 has 8 divisors (see below), whose sum is σ = 29994510. Its totient is φ = 7998528.

The previous prime is 15997063. The next prime is 15997073. The reversal of 15997064 is 46079951.

It can be written as a sum of positive squares in only one way, i.e., 15288100 + 708964 = 3910^2 + 842^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15997063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999809 + ... + 999824.

Almost surely, 2^15997064 is an apocalyptic number.

It is an amenable number.

15997064 is a deficient number, since it is larger than the sum of its proper divisors (13997446).

15997064 is a wasteful number, since it uses less digits than its factorization.

15997064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999639 (or 1999635 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 15997064 is about 3999.6329831623. The cubic root of 15997064 is about 251.9687960019.

The spelling of 15997064 in words is "fifteen million, nine hundred ninety-seven thousand, sixty-four".