72257208 has 32 divisors (see below), whose sum is σ = 191270160. Its totient is φ = 22668800.

The previous prime is 72257173. The next prime is 72257233. The reversal of 72257208 is 80275227.

It is a super-2 number, since 2×72257208² = 10442208215910528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 88143 + ... + 88958.

Almost surely, 2^72257208 is an apocalyptic number.

It is an amenable number.

72257208 is an abundant number, since it is smaller than the sum of its proper divisors (119012952).

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

72257208 is a wasteful number, since it uses less digits than its factorization.

72257208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177127 (or 177123 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 72257208 is about 8500.4239894255. The cubic root of 72257208 is about 416.5115594051.

The spelling of 72257208 in words is "seventy-two million, two hundred fifty-seven thousand, two hundred eight".