253220720 has 20 divisors (see below), whose sum is σ = 588738360. Its totient is φ = 101288256.

The previous prime is 253220713. The next prime is 253220749. The reversal of 253220720 is 27022352.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1582550 + ... + 1582709.

It is an arithmetic number, because the mean of its divisors is an integer number (29436918).

Almost surely, 2^253220720 is an apocalyptic number.

253220720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253220720 is an abundant number, since it is smaller than the sum of its proper divisors (335517640).

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

253220720 is a wasteful number, since it uses less digits than its factorization.

253220720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165272 (or 3165266 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 253220720 is about 15912.9104817441. The cubic root of 253220720 is about 632.6542255939.

The spelling of 253220720 in words is "two hundred fifty-three million, two hundred twenty thousand, seven hundred twenty".