264210640 has 40 divisors (see below), whose sum is σ = 616032000. Its totient is φ = 105384576.

The previous prime is 264210607. The next prime is 264210643. The reversal of 264210640 is 46012462.

264210640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264210643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24861 + ... + 33859.

It is an arithmetic number, because the mean of its divisors is an integer number (15400800).

Almost surely, 2^264210640 is an apocalyptic number.

264210640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

264210640 is an abundant number, since it is smaller than the sum of its proper divisors (351821360).

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

264210640 is a wasteful number, since it uses less digits than its factorization.

264210640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9379 (or 9373 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 264210640 is about 16254.5575147403. The cubic root of 264210640 is about 641.6774355495.

The spelling of 264210640 in words is "two hundred sixty-four million, two hundred ten thousand, six hundred forty".