68840988 has 24 divisors (see below), whose sum is σ = 161144592. Its totient is φ = 22873344.

The previous prime is 68840969. The next prime is 68840999. The reversal of 68840988 is 88904886.

It is a super-2 number, since 2×68840988² = 9478163257632288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68840988.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5245 + ... + 12852.

It is an arithmetic number, because the mean of its divisors is an integer number (6714358).

Almost surely, 2^68840988 is an apocalyptic number.

It is an amenable number.

68840988 is an abundant number, since it is smaller than the sum of its proper divisors (92303604).

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

68840988 is a wasteful number, since it uses less digits than its factorization.

68840988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18421 (or 18419 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 51.

The square root of 68840988 is about 8297.0469445460. The cubic root of 68840988 is about 409.8412790351.

The spelling of 68840988 in words is "sixty-eight million, eight hundred forty thousand, nine hundred eighty-eight".