253781988 has 12 divisors (see below), whose sum is σ = 592158000. Its totient is φ = 84593992.

The previous prime is 253781971. The next prime is 253782007. The reversal of 253781988 is 889187352.

253781988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 253781988.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10574238 + ... + 10574261.

It is an arithmetic number, because the mean of its divisors is an integer number (49346500).

Almost surely, 2^253781988 is an apocalyptic number.

It is an amenable number.

253781988 is an abundant number, since it is smaller than the sum of its proper divisors (338376012).

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

253781988 is a wasteful number, since it uses less digits than its factorization.

253781988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21148506 (or 21148504 counting only the distinct ones).

The product of its digits is 967680, while the sum is 51.

The square root of 253781988 is about 15930.5363374872. The cubic root of 253781988 is about 633.1213102533.

The spelling of 253781988 in words is "two hundred fifty-three million, seven hundred eighty-one thousand, nine hundred eighty-eight".