264440220 has 96 divisors (see below), whose sum is σ = 815947776. Its totient is φ = 63456000.

The previous prime is 264440207. The next prime is 264440251. The reversal of 264440220 is 22044462.

264440220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64677 + ... + 68643.

It is an arithmetic number, because the mean of its divisors is an integer number (8499456).

Almost surely, 2^264440220 is an apocalyptic number.

264440220 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 264440220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407973888).

264440220 is an abundant number, since it is smaller than the sum of its proper divisors (551507556).

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

264440220 is a wasteful number, since it uses less digits than its factorization.

264440220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4091 (or 4089 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 264440220 is about 16261.6180006788. The cubic root of 264440220 is about 641.8632388883.

Adding to 264440220 its reverse (22044462), we get a palindrome (286484682).

The spelling of 264440220 in words is "two hundred sixty-four million, four hundred forty thousand, two hundred twenty".