72407912 has 8 divisors (see below), whose sum is σ = 135764850. Its totient is φ = 36203952.

The previous prime is 72407903. The next prime is 72407921. The reversal of 72407912 is 21970427.

It is an interprime number because it is at equal distance from previous prime (72407903) and next prime (72407921).

It can be written as a sum of positive squares in only one way, i.e., 44169316 + 28238596 = 6646^2 + 5314^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4525487 + ... + 4525502.

Almost surely, 2^72407912 is an apocalyptic number.

It is an amenable number.

72407912 is a deficient number, since it is larger than the sum of its proper divisors (63356938).

72407912 is a wasteful number, since it uses less digits than its factorization.

72407912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9050995 (or 9050991 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 72407912 is about 8509.2838711610. The cubic root of 72407912 is about 416.8009255521.

The spelling of 72407912 in words is "seventy-two million, four hundred seven thousand, nine hundred twelve".