264669840 has 60 divisors (see below), whose sum is σ = 888851964. Its totient is φ = 70578432.

The previous prime is 264669833. The next prime is 264669857. The reversal of 264669840 is 48966462.

It can be written as a sum of positive squares in 2 ways, for example, as 204947856 + 59721984 = 14316^2 + 7728^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

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 11 ways as a sum of consecutive naturals, for example, 183079 + ... + 184518.

Almost surely, 2^264669840 is an apocalyptic number.

264669840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

264669840 is an abundant number, since it is smaller than the sum of its proper divisors (624182124).

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

264669840 is a wasteful number, since it uses less digits than its factorization.

264669840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367616 (or 367607 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 264669840 is about 16268.6766517747. The cubic root of 264669840 is about 642.0489670631.

The spelling of 264669840 in words is "two hundred sixty-four million, six hundred sixty-nine thousand, eight hundred forty".