15000064 has 20 divisors (see below), whose sum is σ = 29971854. Its totient is φ = 7499776.

The previous prime is 15000053. The next prime is 15000067. The reversal of 15000064 is 46000051.

It can be written as a sum of positive squares in only one way, i.e., 11614464 + 3385600 = 3408^2 + 1840^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (15000067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14137 + ... + 15160.

Almost surely, 2^15000064 is an apocalyptic number.

It is an amenable number.

15000064 is a deficient number, since it is larger than the sum of its proper divisors (14971790).

15000064 is an frugal number, since it uses more digits than its factorization.

15000064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29315 (or 29299 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 15000064 is about 3872.9916085631. The cubic root of 15000064 is about 246.6215581827.

The spelling of 15000064 in words is "fifteen million, sixty-four", and thus it is an aban number.