844475864 has 48 divisors (see below), whose sum is σ = 1648722600. Its totient is φ = 405439488.

The previous prime is 844475861. The next prime is 844475873. The reversal of 844475864 is 468574448.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844475861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 908552 + ... + 909480.

Almost surely, 2^844475864 is an apocalyptic number.

It is an amenable number.

844475864 is a deficient number, since it is larger than the sum of its proper divisors (804246736).

844475864 is a wasteful number, since it uses less digits than its factorization.

844475864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092 (or 1051 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 50.

The square root of 844475864 is about 29059.8668957723. The cubic root of 844475864 is about 945.2116820008.

The spelling of 844475864 in words is "eight hundred forty-four million, four hundred seventy-five thousand, eight hundred sixty-four".