268631538 has 32 divisors (see below), whose sum is σ = 646333440. Its totient is φ = 72712080.

The previous prime is 268631527. The next prime is 268631579. The reversal of 268631538 is 835136862.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 268631538.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167518 + ... + 169113.

It is an arithmetic number, because the mean of its divisors is an integer number (20197920).

Almost surely, 2^268631538 is an apocalyptic number.

268631538 is an abundant number, since it is smaller than the sum of its proper divisors (377701902).

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

268631538 is a wasteful number, since it uses less digits than its factorization.

268631538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336662.

The product of its digits is 207360, while the sum is 42.

The square root of 268631538 is about 16389.9828553907. The cubic root of 268631538 is about 645.2366081036.

The spelling of 268631538 in words is "two hundred sixty-eight million, six hundred thirty-one thousand, five hundred thirty-eight".