72056558 has 12 divisors (see below), whose sum is σ = 125731512. Its totient is φ = 30881340.

The previous prime is 72056527. The next prime is 72056573. The reversal of 72056558 is 85565027.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 367538 + ... + 367733.

It is an arithmetic number, because the mean of its divisors is an integer number (10477626).

Almost surely, 2^72056558 is an apocalyptic number.

72056558 is a deficient number, since it is larger than the sum of its proper divisors (53674954).

72056558 is a wasteful number, since it uses less digits than its factorization.

72056558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735287 (or 735280 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 72056558 is about 8488.6134321219. The cubic root of 72056558 is about 416.1256670083.

The spelling of 72056558 in words is "seventy-two million, fifty-six thousand, five hundred fifty-eight".