72576776 has 32 divisors (see below), whose sum is σ = 145316160. Its totient is φ = 33899712.

The previous prime is 72576767. The next prime is 72576793. The reversal of 72576776 is 67767527.

It is a self number, because there is not a number n which added to its sum of digits gives 72576776.

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, 3326 + ... + 12498.

It is an arithmetic number, because the mean of its divisors is an integer number (4541130).

Almost surely, 2^72576776 is an apocalyptic number.

It is an amenable number.

72576776 is an abundant number, since it is smaller than the sum of its proper divisors (72739384).

72576776 is a wasteful number, since it uses less digits than its factorization.

72576776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9245 (or 9241 counting only the distinct ones).

The product of its digits is 864360, while the sum is 47.

The square root of 72576776 is about 8519.2004319654. The cubic root of 72576776 is about 417.1246840415.

Subtracting from 72576776 its reverse (67767527), we obtain a square (4809249 = 2193²).

The spelling of 72576776 in words is "seventy-two million, five hundred seventy-six thousand, seven hundred seventy-six".