264664642 has 32 divisors (see below), whose sum is σ = 460468800. Its totient is φ = 112824000.

The previous prime is 264664637. The next prime is 264664649. The reversal of 264664642 is 246466462.

It is a junction number, because it is equal to n+sod(n) for n = 264664595 and 264664604.

It is not an unprimeable number, because it can be changed into a prime (264664649) 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, 39084 + ... + 45352.

It is an arithmetic number, because the mean of its divisors is an integer number (14389650).

Almost surely, 2^264664642 is an apocalyptic number.

264664642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

264664642 is a deficient number, since it is larger than the sum of its proper divisors (195804158).

264664642 is a wasteful number, since it uses less digits than its factorization.

264664642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6402.

The product of its digits is 331776, while the sum is 40.

The square root of 264664642 is about 16268.5168961402. The cubic root of 264664642 is about 642.0447638485.

The spelling of 264664642 in words is "two hundred sixty-four million, six hundred sixty-four thousand, six hundred forty-two".