268615391 has 8 divisors (see below), whose sum is σ = 297839568. Its totient is φ = 240192000.

The previous prime is 268615381. The next prime is 268615409. The reversal of 268615391 is 193516862.

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

It is a cyclic number.

It is not a de Polignac number, because 268615391 - 2¹⁸ = 268353247 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 (268615381) 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, 199490 + ... + 200831.

It is an arithmetic number, because the mean of its divisors is an integer number (37229946).

Almost surely, 2^268615391 is an apocalyptic number.

268615391 is a deficient number, since it is larger than the sum of its proper divisors (29224177).

268615391 is a wasteful number, since it uses less digits than its factorization.

268615391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400393.

The product of its digits is 77760, while the sum is 41.

The square root of 268615391 is about 16389.4902605298. The cubic root of 268615391 is about 645.2236798074.

The spelling of 268615391 in words is "two hundred sixty-eight million, six hundred fifteen thousand, three hundred ninety-one".