264390684 has 12 divisors (see below), whose sum is σ = 616911624. Its totient is φ = 88130224.

The previous prime is 264390667. The next prime is 264390689. The reversal of 264390684 is 486093462.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264390689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11016267 + ... + 11016290.

It is an arithmetic number, because the mean of its divisors is an integer number (51409302).

Almost surely, 2^264390684 is an apocalyptic number.

It is an amenable number.

264390684 is an abundant number, since it is smaller than the sum of its proper divisors (352520940).

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

264390684 is a wasteful number, since it uses less digits than its factorization.

264390684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22032564 (or 22032562 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 264390684 is about 16260.0948336718. The cubic root of 264390684 is about 641.8231575888.

The spelling of 264390684 in words is "two hundred sixty-four million, three hundred ninety thousand, six hundred eighty-four".