72864444 has 12 divisors (see below), whose sum is σ = 170017064. Its totient is φ = 24288144.

The previous prime is 72864401. The next prime is 72864461. The reversal of 72864444 is 44446827.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×72864444³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

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, 3036007 + ... + 3036030.

Almost surely, 2^72864444 is an apocalyptic number.

It is an amenable number.

72864444 is an abundant number, since it is smaller than the sum of its proper divisors (97152620).

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

72864444 is a wasteful number, since it uses less digits than its factorization.

72864444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6072044 (or 6072042 counting only the distinct ones).

The product of its digits is 172032, while the sum is 39.

The square root of 72864444 is about 8536.0672443462. The cubic root of 72864444 is about 417.6750677942.

The spelling of 72864444 in words is "seventy-two million, eight hundred sixty-four thousand, four hundred forty-four".