268775280 has 80 divisors (see below), whose sum is σ = 925788960. Its totient is φ = 71672832.

The previous prime is 268775279. The next prime is 268775293. The reversal of 268775280 is 82577862.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×268775280² = 144480302278156800, which contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60057 + ... + 64376.

It is an arithmetic number, because the mean of its divisors is an integer number (11572362).

Almost surely, 2^268775280 is an apocalyptic number.

268775280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

268775280 is an abundant number, since it is smaller than the sum of its proper divisors (657013680).

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

268775280 is a wasteful number, since it uses less digits than its factorization.

268775280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124455 (or 124443 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 268775280 is about 16394.3673253956. The cubic root of 268775280 is about 645.3516740949.

The spelling of 268775280 in words is "two hundred sixty-eight million, seven hundred seventy-five thousand, two hundred eighty".