68418831 has 16 divisors (see below), whose sum is σ = 98390880. Its totient is φ = 42040320.

The previous prime is 68418827. The next prime is 68418851. The reversal of 68418831 is 13881486.

It is not a de Polignac number, because 68418831 - 2² = 68418827 is a prime.

It is a super-2 number, since 2×68418831² = 9362272870813122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 68418831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68418821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49591 + ... + 50951.

It is an arithmetic number, because the mean of its divisors is an integer number (6149430).

Almost surely, 2^68418831 is an apocalyptic number.

68418831 is a deficient number, since it is larger than the sum of its proper divisors (29972049).

68418831 is a wasteful number, since it uses less digits than its factorization.

68418831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666.

The product of its digits is 36864, while the sum is 39.

The square root of 68418831 is about 8271.5676265143. The cubic root of 68418831 is about 409.0017973670.

The spelling of 68418831 in words is "sixty-eight million, four hundred eighteen thousand, eight hundred thirty-one".