268644280 has 32 divisors (see below), whose sum is σ = 615859200. Its totient is φ = 105429376.

The previous prime is 268644253. The next prime is 268644283. The reversal of 268644280 is 82446862.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268644283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61240 + ... + 65479.

It is an arithmetic number, because the mean of its divisors is an integer number (19245600).

Almost surely, 2^268644280 is an apocalyptic number.

268644280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

268644280 is an abundant number, since it is smaller than the sum of its proper divisors (347214920).

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

268644280 is a wasteful number, since it uses less digits than its factorization.

268644280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126783 (or 126779 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The square root of 268644280 is about 16390.3715638176. The cubic root of 268644280 is about 645.2468097785.

The spelling of 268644280 in words is "two hundred sixty-eight million, six hundred forty-four thousand, two hundred eighty".