268976381 has 4 divisors (see below), whose sum is σ = 269263164. Its totient is φ = 268689600.

The previous prime is 268976371. The next prime is 268976387. The reversal of 268976381 is 183679862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 193460281 + 75516100 = 13909^2 + 8690^2 .

It is a cyclic number.

It is not a de Polignac number, because 268976381 - 2²⁶ = 201867517 is a prime.

It is a super-2 number, since 2×268976381² = 144696587071714322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268976387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141980 + ... + 143861.

It is an arithmetic number, because the mean of its divisors is an integer number (67315791).

Almost surely, 2^268976381 is an apocalyptic number.

It is an amenable number.

268976381 is a deficient number, since it is larger than the sum of its proper divisors (286783).

268976381 is an equidigital number, since it uses as much as digits as its factorization.

268976381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286782.

The product of its digits is 870912, while the sum is 50.

The square root of 268976381 is about 16400.4994131276. The cubic root of 268976381 is about 645.5125873463.

The spelling of 268976381 in words is "two hundred sixty-eight million, nine hundred seventy-six thousand, three hundred eighty-one".