253961538 has 64 divisors (see below), whose sum is σ = 567171072. Its totient is φ = 75398400.

The previous prime is 253961527. The next prime is 253961551. The reversal of 253961538 is 835169352.

It is a self number, because there is not a number n which added to its sum of digits gives 253961538.

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, 241113 + ... + 242163.

It is an arithmetic number, because the mean of its divisors is an integer number (8862048).

Almost surely, 2^253961538 is an apocalyptic number.

253961538 is an abundant number, since it is smaller than the sum of its proper divisors (313209534).

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

253961538 is a wasteful number, since it uses less digits than its factorization.

253961538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199.

The product of its digits is 194400, while the sum is 42.

The square root of 253961538 is about 15936.1707445672. The cubic root of 253961538 is about 633.2705855347.

The spelling of 253961538 in words is "two hundred fifty-three million, nine hundred sixty-one thousand, five hundred thirty-eight".