268402656 has 96 divisors (see below), whose sum is σ = 733773600. Its totient is φ = 85800960.

The previous prime is 268402633. The next prime is 268402657. The reversal of 268402656 is 656204862.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268402657) 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, 637326 + ... + 637746.

It is an arithmetic number, because the mean of its divisors is an integer number (7643475).

Almost surely, 2^268402656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 268402656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366886800).

268402656 is an abundant number, since it is smaller than the sum of its proper divisors (465370944).

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

268402656 is a wasteful number, since it uses less digits than its factorization.

268402656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 268402656 is about 16382.9989928584. The cubic root of 268402656 is about 645.0533024876.

The spelling of 268402656 in words is "two hundred sixty-eight million, four hundred two thousand, six hundred fifty-six".