864805770 has 48 divisors (see below), whose sum is σ = 2290932072. Its totient is φ = 226262400.

The previous prime is 864805763. The next prime is 864805807. The reversal of 864805770 is 77508468.

It can be written as a sum of positive squares in 4 ways, for example, as 864536409 + 269361 = 29403^2 + 519^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85881 + ... + 95420.

Almost surely, 2^864805770 is an apocalyptic number.

864805770 is an abundant number, since it is smaller than the sum of its proper divisors (1426126302).

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

864805770 is a wasteful number, since it uses less digits than its factorization.

864805770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181367 (or 181364 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 864805770 is about 29407.5801452619. The cubic root of 864805770 is about 952.7366225528.

The spelling of 864805770 in words is "eight hundred sixty-four million, eight hundred five thousand, seven hundred seventy".