68888890 has 16 divisors (see below), whose sum is σ = 141714432. Its totient is φ = 23619024.

The previous prime is 68888873. The next prime is 68888893. The reversal of 68888890 is 9888886.

It is not an unprimeable number, because it can be changed into a prime (68888893) 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, 491994 + ... + 492133.

It is an arithmetic number, because the mean of its divisors is an integer number (8857152).

Almost surely, 2^68888890 is an apocalyptic number.

68888890 is an abundant number, since it is smaller than the sum of its proper divisors (72825542).

68888890 is a wasteful number, since it uses less digits than its factorization.

68888890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984141.

The product of its (nonzero) digits is 1769472, while the sum is 55.

The square root of 68888890 is about 8299.9331322608. The cubic root of 68888890 is about 409.9363176920.

The spelling of 68888890 in words is "sixty-eight million, eight hundred eighty-eight thousand, eight hundred ninety".