264278646 has 16 divisors (see below), whose sum is σ = 587286000. Its totient is φ = 88092864.

The previous prime is 264278629. The next prime is 264278681. The reversal of 264278646 is 646872462.

264278646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2446971 + ... + 2447078.

It is an arithmetic number, because the mean of its divisors is an integer number (36705375).

Almost surely, 2^264278646 is an apocalyptic number.

264278646 is an abundant number, since it is smaller than the sum of its proper divisors (323007354).

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

264278646 is a wasteful number, since it uses less digits than its factorization.

264278646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4894060 (or 4894054 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 264278646 is about 16256.6492857538. The cubic root of 264278646 is about 641.7324852782.

The spelling of 264278646 in words is "two hundred sixty-four million, two hundred seventy-eight thousand, six hundred forty-six".