264391064 has 48 divisors (see below), whose sum is σ = 595298880. Its totient is φ = 109650240.

The previous prime is 264391051. The next prime is 264391067. The reversal of 264391064 is 460193462.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264391067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1274 + ... + 23030.

It is an arithmetic number, because the mean of its divisors is an integer number (12402060).

Almost surely, 2^264391064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 264391064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297649440).

264391064 is an abundant number, since it is smaller than the sum of its proper divisors (330907816).

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

264391064 is a wasteful number, since it uses less digits than its factorization.

264391064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21808 (or 21797 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 264391064 is about 16260.1065187163. The cubic root of 264391064 is about 641.8234650790.

The spelling of 264391064 in words is "two hundred sixty-four million, three hundred ninety-one thousand, sixty-four".