72307672 has 32 divisors (see below), whose sum is σ = 140972400. Its totient is φ = 34728064.

The previous prime is 72307663. The next prime is 72307679. The reversal of 72307672 is 27670327.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72307679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51978 + ... + 53350.

Almost surely, 2^72307672 is an apocalyptic number.

It is an amenable number.

72307672 is a deficient number, since it is larger than the sum of its proper divisors (68664728).

72307672 is a wasteful number, since it uses less digits than its factorization.

72307672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1631 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 34.

The square root of 72307672 is about 8503.3917938667. The cubic root of 72307672 is about 416.6084998981.

Adding to 72307672 its reverse (27670327), we get a palindrome (99977999).

The spelling of 72307672 in words is "seventy-two million, three hundred seven thousand, six hundred seventy-two".