772864 has 18 divisors (see below), whose sum is σ = 1543220. Its totient is φ = 386304.

The previous prime is 772859. The next prime is 772867. The reversal of 772864 is 468277.

It is not an unprimeable number, because it can be changed into a prime (772867) by changing a digit.

772864 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, 1254 + ... + 1765.

2⁷⁷²⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

772864 is a deficient number, since it is larger than the sum of its proper divisors (770356).

772864 is an equidigital number, since it uses as much as digits as its factorization.

772864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3035 (or 3021 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 772864 is about 879.1268395402. The cubic root of 772864 is about 91.7700622107.

The spelling of 772864 in words is "seven hundred seventy-two thousand, eight hundred sixty-four".