264644442 has 32 divisors (see below), whose sum is σ = 593933760. Its totient is φ = 87339600.

The previous prime is 264644431. The next prime is 264644447. The reversal of 264644442 is 244446462.

264644442 is a `hidden beast` number, since 2 + 6 + 4 + 644 + 4 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 264644397 and 264644406.

It is not an unprimeable number, because it can be changed into a prime (264644447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18808 + ... + 29715.

It is an arithmetic number, because the mean of its divisors is an integer number (18560430).

Almost surely, 2^264644442 is an apocalyptic number.

264644442 is an abundant number, since it is smaller than the sum of its proper divisors (329289318).

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

264644442 is a wasteful number, since it uses less digits than its factorization.

264644442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48635 (or 48629 counting only the distinct ones).

The product of its digits is 147456, while the sum is 36.

The square root of 264644442 is about 16267.8960532701. The cubic root of 264644442 is about 642.0284291717.

The spelling of 264644442 in words is "two hundred sixty-four million, six hundred forty-four thousand, four hundred forty-two".