72739132 has 6 divisors (see below), whose sum is σ = 127293488. Its totient is φ = 36369564.

The previous prime is 72739109. The next prime is 72739157. The reversal of 72739132 is 23193727.

It is a super-2 number, since 2×72739132² = 10581962648226848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9092388 + ... + 9092395.

Almost surely, 2^72739132 is an apocalyptic number.

It is an amenable number.

72739132 is a deficient number, since it is larger than the sum of its proper divisors (54554356).

72739132 is a wasteful number, since it uses less digits than its factorization.

72739132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18184787 (or 18184785 counting only the distinct ones).

The product of its digits is 15876, while the sum is 34.

The square root of 72739132 is about 8528.7239373777. The cubic root of 72739132 is about 417.4354917245.

The spelling of 72739132 in words is "seventy-two million, seven hundred thirty-nine thousand, one hundred thirty-two".