68109090 has 32 divisors (see below), whose sum is σ = 186814080. Its totient is φ = 15567744.

The previous prime is 68109079. The next prime is 68109109. The reversal of 68109090 is 9090186.

It is a happy number.

68109090 is a modest number, since divided by 9090 gives 6810 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161955 + ... + 162374.

It is an arithmetic number, because the mean of its divisors is an integer number (5837940).

Almost surely, 2^68109090 is an apocalyptic number.

68109090 is an abundant number, since it is smaller than the sum of its proper divisors (118704990).

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

68109090 is a wasteful number, since it uses less digits than its factorization.

68109090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324346.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 68109090 is about 8252.8231533215. The cubic root of 68109090 is about 408.3836620829.

The spelling of 68109090 in words is "sixty-eight million, one hundred nine thousand, ninety".