1864731264 has 64 divisors (see below), whose sum is σ = 5403494880. Its totient is φ = 565068800.

The previous prime is 1864731223. The next prime is 1864731289. The reversal of 1864731264 is 4621374681.

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, 216507 + ... + 224954.

Almost surely, 2^1864731264 is an apocalyptic number.

It is an amenable number.

1864731264 is an abundant number, since it is smaller than the sum of its proper divisors (3538763616).

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

1864731264 is a wasteful number, since it uses less digits than its factorization.

1864731264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441489 (or 441477 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 1864731264 is about 43182.5342470773. The cubic root of 1864731264 is about 1230.8508146048.

The spelling of 1864731264 in words is "one billion, eight hundred sixty-four million, seven hundred thirty-one thousand, two hundred sixty-four".