764505 has 32 divisors (see below), whose sum is σ = 1555200. Its totient is φ = 349056.

The previous prime is 764501. The next prime is 764521. The reversal of 764505 is 505467.

It is not a de Polignac number, because 764505 - 2² = 764501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (764501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 541 + ... + 1349.

It is an arithmetic number, because the mean of its divisors is an integer number (48600).

2⁷⁶⁴⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

764505 is an abundant number, since it is smaller than the sum of its proper divisors (790695).

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

764505 is a wasteful number, since it uses less digits than its factorization.

764505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 764505 is about 874.3597657715. The cubic root of 764505 is about 91.4380123017.

The spelling of 764505 in words is "seven hundred sixty-four thousand, five hundred five".