68881890 has 64 divisors (see below), whose sum is σ = 206115840. Its totient is φ = 14312640.

The previous prime is 68881889. The next prime is 68881933. The reversal of 68881890 is 9818886.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12600 + ... + 17219.

It is an arithmetic number, because the mean of its divisors is an integer number (3220560).

Almost surely, 2^68881890 is an apocalyptic number.

68881890 is an abundant number, since it is smaller than the sum of its proper divisors (137233950).

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

68881890 is a wasteful number, since it uses less digits than its factorization.

68881890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29847.

The product of its (nonzero) digits is 221184, while the sum is 48.

The square root of 68881890 is about 8299.5114314037. The cubic root of 68881890 is about 409.9224322821.

It can be divided in two parts, 6888 and 1890, that added together give a palindrome (8778).

The spelling of 68881890 in words is "sixty-eight million, eight hundred eighty-one thousand, eight hundred ninety".