72712532 has 6 divisors (see below), whose sum is σ = 127246938. Its totient is φ = 36356264.

The previous prime is 72712529. The next prime is 72712537. The reversal of 72712532 is 23521727.

It can be written as a sum of positive squares in only one way, i.e., 62188996 + 10523536 = 7886^2 + 3244^2 .

It is a super-2 number, since 2×72712532² = 10574224619702048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72712495 and 72712504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72712537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9089063 + ... + 9089070.

It is an arithmetic number, because the mean of its divisors is an integer number (21207823).

Almost surely, 2^72712532 is an apocalyptic number.

It is an amenable number.

72712532 is a deficient number, since it is larger than the sum of its proper divisors (54534406).

72712532 is a wasteful number, since it uses less digits than its factorization.

72712532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18178137 (or 18178135 counting only the distinct ones).

The product of its digits is 5880, while the sum is 29.

The square root of 72712532 is about 8527.1643586834. The cubic root of 72712532 is about 417.3846014744.

The spelling of 72712532 in words is "seventy-two million, seven hundred twelve thousand, five hundred thirty-two".