264263220 has 144 divisors (see below), whose sum is σ = 891351552. Its totient is φ = 62933760.

The previous prime is 264263203. The next prime is 264263221. The reversal of 264263220 is 22362462.

264263220 is a `hidden beast` number, since 2 + 6 + 4 + 2 + 632 + 20 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264263221) 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 47 ways as a sum of consecutive naturals, for example, 70719 + ... + 74361.

Almost surely, 2^264263220 is an apocalyptic number.

264263220 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 264263220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (445675776).

264263220 is an abundant number, since it is smaller than the sum of its proper divisors (627088332).

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

264263220 is a wasteful number, since it uses less digits than its factorization.

264263220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3702 (or 3697 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 264263220 is about 16256.1748268158. The cubic root of 264263220 is about 641.7199990154.

It can be divided in two parts, 26426 and 3220, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 264263220 in words is "two hundred sixty-four million, two hundred sixty-three thousand, two hundred twenty".