72909532 has 12 divisors (see below), whose sum is σ = 135097200. Its totient is φ = 34310336.

The previous prime is 72909523. The next prime is 72909533. The reversal of 72909532 is 23590927.

It is a junction number, because it is equal to n+sod(n) for n = 72909491 and 72909500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72909533) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 536032 + ... + 536167.

It is an arithmetic number, because the mean of its divisors is an integer number (11258100).

Almost surely, 2^72909532 is an apocalyptic number.

It is an amenable number.

72909532 is a deficient number, since it is larger than the sum of its proper divisors (62187668).

72909532 is a wasteful number, since it uses less digits than its factorization.

72909532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072220 (or 1072218 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 72909532 is about 8538.7078647767. The cubic root of 72909532 is about 417.7612014846.

It can be divided in two parts, 72909 and 532, that added together give a square (73441 = 271²).

The spelling of 72909532 in words is "seventy-two million, nine hundred nine thousand, five hundred thirty-two".