264630891 has 32 divisors (see below), whose sum is σ = 428156928. Its totient is φ = 141926400.

The previous prime is 264630889. The next prime is 264630929. The reversal of 264630891 is 198036462.

It is not a de Polignac number, because 264630891 - 2¹ = 264630889 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (264630881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164491 + ... + 166091.

It is an arithmetic number, because the mean of its divisors is an integer number (13379904).

Almost surely, 2^264630891 is an apocalyptic number.

264630891 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

264630891 is a deficient number, since it is larger than the sum of its proper divisors (163526037).

264630891 is a wasteful number, since it uses less digits than its factorization.

264630891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 264630891 is about 16267.4795527765. The cubic root of 264630891 is about 642.0174707253.

The spelling of 264630891 in words is "two hundred sixty-four million, six hundred thirty thousand, eight hundred ninety-one".