72478732 has 6 divisors (see below), whose sum is σ = 126837788. Its totient is φ = 36239364.

The previous prime is 72478723. The next prime is 72478741. The reversal of 72478732 is 23787427.

It is an interprime number because it is at equal distance from previous prime (72478723) and next prime (72478741).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9059838 + ... + 9059845.

Almost surely, 2^72478732 is an apocalyptic number.

It is an amenable number.

72478732 is a deficient number, since it is larger than the sum of its proper divisors (54359056).

72478732 is a wasteful number, since it uses less digits than its factorization.

72478732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18119687 (or 18119685 counting only the distinct ones).

The product of its digits is 131712, while the sum is 40.

The square root of 72478732 is about 8513.4441913952. Note that the first 3 decimals coincide. The cubic root of 72478732 is about 416.9367680885.

The spelling of 72478732 in words is "seventy-two million, four hundred seventy-eight thousand, seven hundred thirty-two".