268191864 has 64 divisors (see below), whose sum is σ = 788810400. Its totient is φ = 84137472.

The previous prime is 268191839. The next prime is 268191871. The reversal of 268191864 is 468191862.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 32847 + ... + 40190.

Almost surely, 2^268191864 is an apocalyptic number.

268191864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

268191864 is an abundant number, since it is smaller than the sum of its proper divisors (520618536).

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

268191864 is a wasteful number, since it uses less digits than its factorization.

268191864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73069 (or 73059 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 268191864 is about 16376.5644748830. The cubic root of 268191864 is about 644.8843924765.

The spelling of 268191864 in words is "two hundred sixty-eight million, one hundred ninety-one thousand, eight hundred sixty-four".