264428964 has 18 divisors (see below), whose sum is σ = 668417750. Its totient is φ = 88142976.

The previous prime is 264428951. The next prime is 264428971. The reversal of 264428964 is 469824462.

It can be written as a sum of positive squares in only one way, i.e., 263412900 + 1016064 = 16230^2 + 1008^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×264428964² = 139845354004226592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3672589 + ... + 3672660.

Almost surely, 2^264428964 is an apocalyptic number.

It is an amenable number.

264428964 is an abundant number, since it is smaller than the sum of its proper divisors (403988786).

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

264428964 is a wasteful number, since it uses less digits than its factorization.

264428964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7345259 (or 7345254 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 264428964 is about 16261.2719059734. The cubic root of 264428964 is about 641.8541317069.

The spelling of 264428964 in words is "two hundred sixty-four million, four hundred twenty-eight thousand, nine hundred sixty-four".