72057278 has 16 divisors (see below), whose sum is σ = 112536240. Its totient is φ = 34572096.

The previous prime is 72057269. The next prime is 72057289. The reversal of 72057278 is 87275027.

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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1268 + ... + 12071.

It is an arithmetic number, because the mean of its divisors is an integer number (7033515).

Almost surely, 2^72057278 is an apocalyptic number.

72057278 is a deficient number, since it is larger than the sum of its proper divisors (40478962).

72057278 is a wasteful number, since it uses less digits than its factorization.

72057278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13451.

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 72057278 is about 8488.6558417691. The cubic root of 72057278 is about 416.1270530005.

The spelling of 72057278 in words is "seventy-two million, fifty-seven thousand, two hundred seventy-eight".