1818420864 has 64 divisors (see below), whose sum is σ = 5201747040. Its totient is φ = 559512576.

The previous prime is 1818420853. The next prime is 1818420881. The reversal of 1818420864 is 4680248181.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177142 + ... + 187125.

Almost surely, 2^1818420864 is an apocalyptic number.

It is an amenable number.

1818420864 is an abundant number, since it is smaller than the sum of its proper divisors (3383326176).

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

1818420864 is a wasteful number, since it uses less digits than its factorization.

1818420864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364297 (or 364285 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 42.

The square root of 1818420864 is about 42642.9462396772. The cubic root of 1818420864 is about 1220.5759316038.

The spelling of 1818420864 in words is "one billion, eight hundred eighteen million, four hundred twenty thousand, eight hundred sixty-four".