72866544 has 40 divisors (see below), whose sum is σ = 192249600. Its totient is φ = 23771328.

The previous prime is 72866543. The next prime is 72866567. The reversal of 72866544 is 44566827.

It is a junction number, because it is equal to n+sod(n) for n = 72866496 and 72866505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72866543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13894 + ... + 18405.

It is an arithmetic number, because the mean of its divisors is an integer number (4806240).

Almost surely, 2^72866544 is an apocalyptic number.

It is an amenable number.

72866544 is an abundant number, since it is smaller than the sum of its proper divisors (119383056).

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

72866544 is a wasteful number, since it uses less digits than its factorization.

72866544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32357 (or 32351 counting only the distinct ones).

The product of its digits is 322560, while the sum is 42.

The square root of 72866544 is about 8536.1902509258. The cubic root of 72866544 is about 417.6790803101.

The spelling of 72866544 in words is "seventy-two million, eight hundred sixty-six thousand, five hundred forty-four".