72774584 has 8 divisors (see below), whose sum is σ = 136452360. Its totient is φ = 36387288.

The previous prime is 72774571. The next prime is 72774587. The reversal of 72774584 is 48547727.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×72774584² = 10592280152746112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72774587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4548404 + ... + 4548419.

It is an arithmetic number, because the mean of its divisors is an integer number (17056545).

Almost surely, 2^72774584 is an apocalyptic number.

It is an amenable number.

72774584 is a deficient number, since it is larger than the sum of its proper divisors (63677776).

72774584 is a wasteful number, since it uses less digits than its factorization.

72774584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9096829 (or 9096825 counting only the distinct ones).

The product of its digits is 439040, while the sum is 44.

The square root of 72774584 is about 8530.8020724900. The cubic root of 72774584 is about 417.5032980485.

The spelling of 72774584 in words is "seventy-two million, seven hundred seventy-four thousand, five hundred eighty-four".