268992540 has 36 divisors (see below), whose sum is σ = 815944584. Its totient is φ = 71731296.

The previous prime is 268992533. The next prime is 268992583. The reversal of 268992540 is 45299862.

268992540 is a `hidden beast` number, since 26 + 89 + 9 + 2 + 540 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 747022 + ... + 747381.

Almost surely, 2^268992540 is an apocalyptic number.

268992540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

268992540 is an abundant number, since it is smaller than the sum of its proper divisors (546952044).

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

268992540 is a wasteful number, since it uses less digits than its factorization.

268992540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494418 (or 1494413 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 268992540 is about 16400.9920431662. The cubic root of 268992540 is about 645.5255136721.

The spelling of 268992540 in words is "two hundred sixty-eight million, nine hundred ninety-two thousand, five hundred forty".