72776634 has 16 divisors (see below), whose sum is σ = 166346688. Its totient is φ = 20793312.

The previous prime is 72776611. The next prime is 72776651. The reversal of 72776634 is 43667727.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1732777 = 72776634 / (7 + 2 + 7 + 7 + 6 + 6 + 3 + 4).

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, 866347 + ... + 866430.

It is an arithmetic number, because the mean of its divisors is an integer number (10396668).

Almost surely, 2^72776634 is an apocalyptic number.

72776634 is an abundant number, since it is smaller than the sum of its proper divisors (93570054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72776634 is a wasteful number, since it uses less digits than its factorization.

72776634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732789.

The product of its digits is 296352, while the sum is 42.

The square root of 72776634 is about 8530.9222244726. The cubic root of 72776634 is about 417.5072182528.

The spelling of 72776634 in words is "seventy-two million, seven hundred seventy-six thousand, six hundred thirty-four".