72245944 has 32 divisors (see below), whose sum is σ = 141834240. Its totient is φ = 34434400.

The previous prime is 72245917. The next prime is 72245981. The reversal of 72245944 is 44954227.

It is a super-2 number, since 2×72245944² = 10438952848902272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78849 + ... + 79759.

It is an arithmetic number, because the mean of its divisors is an integer number (4432320).

Almost surely, 2^72245944 is an apocalyptic number.

It is an amenable number.

72245944 is a deficient number, since it is larger than the sum of its proper divisors (69588296).

72245944 is a wasteful number, since it uses less digits than its factorization.

72245944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371 (or 1367 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 72245944 is about 8499.7614084161. The cubic root of 72245944 is about 416.4899152899.

It can be divided in two parts, 72 and 245944, that added together give a square (246016 = 496²).

The spelling of 72245944 in words is "seventy-two million, two hundred forty-five thousand, nine hundred forty-four".