268992657 has 20 divisors (see below), whose sum is σ = 402564096. Its totient is φ = 179000280.

The previous prime is 268992643. The next prime is 268992667. The reversal of 268992657 is 756299862.

It is not a de Polignac number, because 268992657 - 2⁴ = 268992641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (268992617) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 46432 + ... + 51902.

Almost surely, 2^268992657 is an apocalyptic number.

268992657 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

268992657 is a deficient number, since it is larger than the sum of its proper divisors (133571439).

268992657 is an equidigital number, since it uses as much as digits as its factorization.

268992657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6090 (or 6081 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 268992657 is about 16400.9956100232. The cubic root of 268992657 is about 645.5256072639.

The spelling of 268992657 in words is "two hundred sixty-eight million, nine hundred ninety-two thousand, six hundred fifty-seven".