1800864456 has 64 divisors (see below), whose sum is σ = 4540536000. Its totient is φ = 595196928.

The previous prime is 1800864437. The next prime is 1800864469. The reversal of 1800864456 is 6544680081.

It is a super-2 number, since 2×1800864456² = 6486225577768351872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1716220 + ... + 1717268.

It is an arithmetic number, because the mean of its divisors is an integer number (70945875).

Almost surely, 2^1800864456 is an apocalyptic number.

It is an amenable number.

1800864456 is an abundant number, since it is smaller than the sum of its proper divisors (2739671544).

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

1800864456 is a wasteful number, since it uses less digits than its factorization.

1800864456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598 (or 1594 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 1800864456 is about 42436.5933599765. The cubic root of 1800864456 is about 1216.6351011347.

The spelling of 1800864456 in words is "one billion, eight hundred million, eight hundred sixty-four thousand, four hundred fifty-six".