264187320 has 64 divisors (see below), whose sum is σ = 797368320. Its totient is φ = 70022784.

The previous prime is 264187277. The next prime is 264187349. The reversal of 264187320 is 23781462.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13449 + ... + 26631.

It is an arithmetic number, because the mean of its divisors is an integer number (12458880).

Almost surely, 2^264187320 is an apocalyptic number.

264187320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 264187320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398684160).

264187320 is an abundant number, since it is smaller than the sum of its proper divisors (533181000).

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

264187320 is a wasteful number, since it uses less digits than its factorization.

264187320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13364 (or 13360 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 264187320 is about 16253.8401616356. The cubic root of 264187320 is about 641.6585562214.

The spelling of 264187320 in words is "two hundred sixty-four million, one hundred eighty-seven thousand, three hundred twenty".