72438044 has 12 divisors (see below), whose sum is σ = 144876144. Its totient is φ = 31044864.

The previous prime is 72438019. The next prime is 72438053. The reversal of 72438044 is 44083427.

72438044 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 72438044.

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, 1293509 + ... + 1293564.

It is an arithmetic number, because the mean of its divisors is an integer number (12073012).

Almost surely, 2^72438044 is an apocalyptic number.

It is an amenable number.

72438044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72438044 is a wasteful number, since it uses less digits than its factorization.

72438044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2587084 (or 2587082 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 72438044 is about 8511.0542237728. The cubic root of 72438044 is about 416.8587337088.

The spelling of 72438044 in words is "seventy-two million, four hundred thirty-eight thousand, forty-four".