72238536252 has 72 divisors (see below), whose sum is σ = 191711554944. Its totient is φ = 22891229856.

The previous prime is 72238536247. The next prime is 72238536263. The reversal of 72238536252 is 25263583227.

72238536252 is a `hidden beast` number, since 7 + 2 + 238 + 5 + 362 + 52 = 666.

It is a super-2 number, since 2×72238536252² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72238536198 and 72238536207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132658 + ... + 402585.

Almost surely, 2^72238536252 is an apocalyptic number.

It is an amenable number.

72238536252 is an abundant number, since it is smaller than the sum of its proper divisors (119473018692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72238536252 is a wasteful number, since it uses less digits than its factorization.

72238536252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535439 (or 535434 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 45.

The spelling of 72238536252 in words is "seventy-two billion, two hundred thirty-eight million, five hundred thirty-six thousand, two hundred fifty-two".