268508631 has 8 divisors (see below), whose sum is σ = 366743664. Its totient is φ = 174639680.

The previous prime is 268508623. The next prime is 268508677. The reversal of 268508631 is 136805862.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 268508631 - 2³ = 268508623 is a prime.

It is a super-2 number, since 2×268508631² = 144193769842988322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 268508631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268508431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1091376 + ... + 1091621.

It is an arithmetic number, because the mean of its divisors is an integer number (45842958).

Almost surely, 2^268508631 is an apocalyptic number.

268508631 is a deficient number, since it is larger than the sum of its proper divisors (98235033).

268508631 is a wasteful number, since it uses less digits than its factorization.

268508631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183041.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 268508631 is about 16386.2329716137. The cubic root of 268508631 is about 645.1381880470.

The spelling of 268508631 in words is "two hundred sixty-eight million, five hundred eight thousand, six hundred thirty-one".