255640268 has 24 divisors (see below), whose sum is σ = 483806400. Its totient is φ = 117492480.

The previous prime is 255640267. The next prime is 255640279. The reversal of 255640268 is 862046552.

It is a super-2 number, since 2×255640268² = 130703893246223648, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (255640267) 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, 2333 + ... + 22731.

It is an arithmetic number, because the mean of its divisors is an integer number (20158600).

Almost surely, 2^255640268 is an apocalyptic number.

It is an amenable number.

255640268 is a deficient number, since it is larger than the sum of its proper divisors (228166132).

255640268 is a wasteful number, since it uses less digits than its factorization.

255640268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20657 (or 20655 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 255640268 is about 15988.7544230312. The cubic root of 255640268 is about 634.6628652459.

It can be divided in two parts, 2556 and 40268, that added together give a palindrome (42824).

The spelling of 255640268 in words is "two hundred fifty-five million, six hundred forty thousand, two hundred sixty-eight".