72604778 has 16 divisors (see below), whose sum is σ = 110729160. Its totient is φ = 35698176.

The previous prime is 72604723. The next prime is 72604781. The reversal of 72604778 is 87740627.

It can be written as a sum of positive squares in 4 ways, for example, as 72199009 + 405769 = 8497^2 + 637^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73826 + ... + 74802.

Almost surely, 2^72604778 is an apocalyptic number.

72604778 is a deficient number, since it is larger than the sum of its proper divisors (38124382).

72604778 is a wasteful number, since it uses less digits than its factorization.

72604778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 72604778 is about 8520.8437375650. The cubic root of 72604778 is about 417.1783229794.

The spelling of 72604778 in words is "seventy-two million, six hundred four thousand, seven hundred seventy-eight".