72911140 has 12 divisors (see below), whose sum is σ = 153113436. Its totient is φ = 29164448.

The previous prime is 72911131. The next prime is 72911177. The reversal of 72911140 is 4111927.

It can be written as a sum of positive squares in 2 ways, for example, as 35236096 + 37675044 = 5936^2 + 6138^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1822759 + ... + 1822798.

It is an arithmetic number, because the mean of its divisors is an integer number (12759453).

Almost surely, 2^72911140 is an apocalyptic number.

It is an amenable number.

72911140 is an abundant number, since it is smaller than the sum of its proper divisors (80202296).

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

72911140 is a wasteful number, since it uses less digits than its factorization.

72911140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645566 (or 3645564 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 72911140 is about 8538.8020237033. The cubic root of 72911140 is about 417.7642726655.

The spelling of 72911140 in words is "seventy-two million, nine hundred eleven thousand, one hundred forty".