68137188 has 24 divisors (see below), whose sum is σ = 181699392. Its totient is φ = 19467744.

The previous prime is 68137187. The next prime is 68137189. The reversal of 68137188 is 88173186.

It is an interprime number because it is at equal distance from previous prime (68137187) and next prime (68137189).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (68137187) 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, 405495 + ... + 405662.

It is an arithmetic number, because the mean of its divisors is an integer number (7570808).

Almost surely, 2^68137188 is an apocalyptic number.

It is an amenable number.

68137188 is an abundant number, since it is smaller than the sum of its proper divisors (113562204).

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

68137188 is a wasteful number, since it uses less digits than its factorization.

68137188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811171 (or 811169 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 68137188 is about 8254.5253043406. The cubic root of 68137188 is about 408.4398131123.

The spelling of 68137188 in words is "sixty-eight million, one hundred thirty-seven thousand, one hundred eighty-eight".