72000012 has 36 divisors (see below), whose sum is σ = 195430200. Its totient is φ = 20571264.

The previous prime is 72000007. The next prime is 72000053. The reversal of 72000012 is 21000027.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60637 + ... + 61812.

Almost surely, 2^72000012 is an apocalyptic number.

It is an amenable number.

72000012 is an abundant number, since it is smaller than the sum of its proper divisors (123430188).

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

72000012 is a wasteful number, since it uses less digits than its factorization.

72000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122470 (or 122461 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 72000012 is about 8485.2820813453. The cubic root of 72000012 is about 416.0167877224.

Adding to 72000012 its reverse (21000027), we get a palindrome (93000039).

The spelling of 72000012 in words is "seventy-two million, twelve", and thus it is an aban number and an uban number.