72432631 has 4 divisors (see below), whose sum is σ = 76693392. Its totient is φ = 68171872.

The previous prime is 72432611. The next prime is 72432637. The reversal of 72432631 is 13623427.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72432631 - 2⁵ = 72432599 is a prime.

It is a super-2 number, since 2×72432631² = 10492972067164322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72432631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72432637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2130355 + ... + 2130388.

It is an arithmetic number, because the mean of its divisors is an integer number (19173348).

Almost surely, 2^72432631 is an apocalyptic number.

72432631 is a deficient number, since it is larger than the sum of its proper divisors (4260761).

72432631 is a wasteful number, since it uses less digits than its factorization.

72432631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4260760.

The product of its digits is 6048, while the sum is 28.

The square root of 72432631 is about 8510.7362196228. The cubic root of 72432631 is about 416.8483500650.

The spelling of 72432631 in words is "seventy-two million, four hundred thirty-two thousand, six hundred thirty-one".