253520660 has 24 divisors (see below), whose sum is σ = 563711400. Its totient is φ = 95442944.

The previous prime is 253520587. The next prime is 253520681. The reversal of 253520660 is 66025352.

It is a happy number.

253520660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 26234884 + 227285776 = 5122^2 + 15076^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372485 + ... + 373164.

It is an arithmetic number, because the mean of its divisors is an integer number (23487975).

Almost surely, 2^253520660 is an apocalyptic number.

253520660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253520660 is an abundant number, since it is smaller than the sum of its proper divisors (310190740).

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

253520660 is a wasteful number, since it uses less digits than its factorization.

253520660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745675 (or 745673 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 253520660 is about 15922.3321156167. The cubic root of 253520660 is about 632.9039200565.

The spelling of 253520660 in words is "two hundred fifty-three million, five hundred twenty thousand, six hundred sixty".