253239660 has 72 divisors (see below), whose sum is σ = 801571680. Its totient is φ = 64593408.

The previous prime is 253239659. The next prime is 253239689. The reversal of 253239660 is 66932352.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26445 + ... + 34724.

It is an arithmetic number, because the mean of its divisors is an integer number (11132940).

Almost surely, 2^253239660 is an apocalyptic number.

253239660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253239660 is an abundant number, since it is smaller than the sum of its proper divisors (548332020).

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

253239660 is a wasteful number, since it uses less digits than its factorization.

253239660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61207 (or 61202 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 253239660 is about 15913.5055848798. The cubic root of 253239660 is about 632.6699986216.

The spelling of 253239660 in words is "two hundred fifty-three million, two hundred thirty-nine thousand, six hundred sixty".