764564 has 6 divisors (see below), whose sum is σ = 1337994. Its totient is φ = 382280.

The previous prime is 764563. The next prime is 764587. The reversal of 764564 is 465467.

764564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 739600 + 24964 = 860^2 + 158^2 .

It is a super-2 number, since 2×764564² = 1169116220192, which contains 22 as substring.

It is an Ulam number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 764564.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95567 + ... + 95574.

It is an arithmetic number, because the mean of its divisors is an integer number (222999).

2⁷⁶⁴⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

764564 is a deficient number, since it is larger than the sum of its proper divisors (573430).

764564 is a wasteful number, since it uses less digits than its factorization.

764564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191145 (or 191143 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 764564 is about 874.3935040930. The cubic root of 764564 is about 91.4403644572.

The spelling of 764564 in words is "seven hundred sixty-four thousand, five hundred sixty-four".