1868866464 has 24 divisors (see below), whose sum is σ = 4905774720. Its totient is φ = 622955456.

The previous prime is 1868866451. The next prime is 1868866561. The reversal of 1868866464 is 4646688681.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9733584 + ... + 9733775.

It is an arithmetic number, because the mean of its divisors is an integer number (204407280).

Almost surely, 2^1868866464 is an apocalyptic number.

It is an amenable number.

1868866464 is an abundant number, since it is smaller than the sum of its proper divisors (3036908256).

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

1868866464 is a wasteful number, since it uses less digits than its factorization.

1868866464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19467372 (or 19467364 counting only the distinct ones).

The product of its digits is 10616832, while the sum is 57.

The square root of 1868866464 is about 43230.3882008941. The cubic root of 1868866464 is about 1231.7599816342.

The spelling of 1868866464 in words is "one billion, eight hundred sixty-eight million, eight hundred sixty-six thousand, four hundred sixty-four".