268958639 has 8 divisors (see below), whose sum is σ = 275205120. Its totient is φ = 262768536.

The previous prime is 268958629. The next prime is 268958671. The reversal of 268958639 is 936859862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-268958639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268958629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4367 + ... + 23600.

It is an arithmetic number, because the mean of its divisors is an integer number (34400640).

Almost surely, 2^268958639 is an apocalyptic number.

268958639 is a deficient number, since it is larger than the sum of its proper divisors (6246481).

268958639 is a wasteful number, since it uses less digits than its factorization.

268958639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28189.

The product of its digits is 5598720, while the sum is 56.

The square root of 268958639 is about 16399.9585060451. The cubic root of 268958639 is about 645.4983941098.

The spelling of 268958639 in words is "two hundred sixty-eight million, nine hundred fifty-eight thousand, six hundred thirty-nine".