72472132 has 6 divisors (see below), whose sum is σ = 126826238. Its totient is φ = 36236064.

The previous prime is 72472129. The next prime is 72472193. The reversal of 72472132 is 23127427.

It can be written as a sum of positive squares in only one way, i.e., 55711296 + 16760836 = 7464^2 + 4094^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72472132.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9059013 + ... + 9059020.

Almost surely, 2^72472132 is an apocalyptic number.

It is an amenable number.

72472132 is a deficient number, since it is larger than the sum of its proper divisors (54354106).

72472132 is a wasteful number, since it uses less digits than its factorization.

72472132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18118037 (or 18118035 counting only the distinct ones).

The product of its digits is 4704, while the sum is 28.

The square root of 72472132 is about 8513.0565603666. The cubic root of 72472132 is about 416.9241121174.

Adding to 72472132 its reverse (23127427), we get a palindrome (95599559).

The spelling of 72472132 in words is "seventy-two million, four hundred seventy-two thousand, one hundred thirty-two".