268915731 has 16 divisors (see below), whose sum is σ = 422995968. Its totient is φ = 148708800.

The previous prime is 268915727. The next prime is 268915733. The reversal of 268915731 is 137519862.

It is not a de Polignac number, because 268915731 - 2² = 268915727 is a prime.

It is a super-2 number, since 2×268915731² = 144631340758528722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (268915733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205890 + ... + 207191.

It is an arithmetic number, because the mean of its divisors is an integer number (26437248).

Almost surely, 2^268915731 is an apocalyptic number.

268915731 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

268915731 is a deficient number, since it is larger than the sum of its proper divisors (154080237).

268915731 is a wasteful number, since it uses less digits than its factorization.

268915731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413122.

The product of its digits is 90720, while the sum is 42.

The square root of 268915731 is about 16398.6502798249. The cubic root of 268915731 is about 645.4640660087.

The spelling of 268915731 in words is "two hundred sixty-eight million, nine hundred fifteen thousand, seven hundred thirty-one".