264020644 has 12 divisors (see below), whose sum is σ = 462153244. Its totient is φ = 131976864.

The previous prime is 264020629. The next prime is 264020683. The reversal of 264020644 is 446020462.

It can be written as a sum of positive squares in 2 ways, for example, as 177902244 + 86118400 = 13338^2 + 9280^2 .

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, 20314 + ... + 30670.

Almost surely, 2^264020644 is an apocalyptic number.

It is an amenable number.

264020644 is a deficient number, since it is larger than the sum of its proper divisors (198132600).

264020644 is a wasteful number, since it uses less digits than its factorization.

264020644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16734 (or 16732 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 264020644 is about 16248.7120720382. The cubic root of 264020644 is about 641.5235868610.

The spelling of 264020644 in words is "two hundred sixty-four million, twenty thousand, six hundred forty-four".