68388090 has 32 divisors (see below), whose sum is σ = 169793280. Its totient is φ = 17607744.

The previous prime is 68388043. The next prime is 68388091. The reversal of 68388090 is 9088386.

It is not an unprimeable number, because it can be changed into a prime (68388091) 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, 38434 + ... + 40173.

It is an arithmetic number, because the mean of its divisors is an integer number (5306040).

Almost surely, 2^68388090 is an apocalyptic number.

68388090 is an abundant number, since it is smaller than the sum of its proper divisors (101405190).

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

68388090 is a wasteful number, since it uses less digits than its factorization.

68388090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78646.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 68388090 is about 8269.7091847295. The cubic root of 68388090 is about 408.9405325193.

The spelling of 68388090 in words is "sixty-eight million, three hundred eighty-eight thousand, ninety".