772736 has 16 divisors (see below), whose sum is σ = 1539690. Its totient is φ = 386304.

The previous prime is 772721. The next prime is 772757. The reversal of 772736 is 637277.

It can be written as a sum of positive squares in only one way, i.e., 732736 + 40000 = 856^2 + 200^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 772736.

It is an unprimeable number.

772736 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2891 + ... + 3146.

2⁷⁷²⁷³⁶ is an apocalyptic number.

It is an amenable number.

772736 is a deficient number, since it is larger than the sum of its proper divisors (766954).

772736 is an equidigital number, since it uses as much as digits as its factorization.

772736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6051 (or 6039 counting only the distinct ones).

The product of its digits is 12348, while the sum is 32.

The square root of 772736 is about 879.0540370193. The cubic root of 772736 is about 91.7649956805.

The spelling of 772736 in words is "seven hundred seventy-two thousand, seven hundred thirty-six".