764864487 has 24 divisors (see below), whose sum is σ = 1121374800. Its totient is φ = 502305408.

The previous prime is 764864483. The next prime is 764864489. The reversal of 764864487 is 784468467.

It is not a de Polignac number, because 764864487 - 2² = 764864483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764864483) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 233064 + ... + 236322.

It is an arithmetic number, because the mean of its divisors is an integer number (46723950).

Almost surely, 2^764864487 is an apocalyptic number.

764864487 is a deficient number, since it is larger than the sum of its proper divisors (356510313).

764864487 is a wasteful number, since it uses less digits than its factorization.

764864487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3647 (or 3644 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 54.

The square root of 764864487 is about 27656.1835219540. The cubic root of 764864487 is about 914.5234210809.

The spelling of 764864487 in words is "seven hundred sixty-four million, eight hundred sixty-four thousand, four hundred eighty-seven".