72592978 has 8 divisors (see below), whose sum is σ = 109277820. Its totient is φ = 36167040.

The previous prime is 72592969. The next prime is 72592981. The reversal of 72592978 is 87929527.

It can be written as a sum of positive squares in 2 ways, for example, as 70778569 + 1814409 = 8413^2 + 1347^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 64023 + ... + 65146.

Almost surely, 2^72592978 is an apocalyptic number.

72592978 is a deficient number, since it is larger than the sum of its proper divisors (36684842).

72592978 is a wasteful number, since it uses less digits than its factorization.

72592978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129452.

The product of its digits is 635040, while the sum is 49.

The square root of 72592978 is about 8520.1512897366. The cubic root of 72592978 is about 417.1557212946.

The spelling of 72592978 in words is "seventy-two million, five hundred ninety-two thousand, nine hundred seventy-eight".