72813544 has 16 divisors (see below), whose sum is σ = 140929920. Its totient is φ = 35232240.

The previous prime is 72813541. The next prime is 72813547. The reversal of 72813544 is 44531827.

It is an interprime number because it is at equal distance from previous prime (72813541) and next prime (72813547).

It is not an unprimeable number, because it can be changed into a prime (72813541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146554 + ... + 147049.

It is an arithmetic number, because the mean of its divisors is an integer number (8808120).

Almost surely, 2^72813544 is an apocalyptic number.

It is an amenable number.

72813544 is a deficient number, since it is larger than the sum of its proper divisors (68116376).

72813544 is a wasteful number, since it uses less digits than its factorization.

72813544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293640 (or 293636 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 72813544 is about 8533.0852568107. The cubic root of 72813544 is about 417.5777884625.

The spelling of 72813544 in words is "seventy-two million, eight hundred thirteen thousand, five hundred forty-four".