68308988 has 24 divisors (see below), whose sum is σ = 136080000. Its totient is φ = 29699120.

The previous prime is 68308969. The next prime is 68309041. The reversal of 68308988 is 88980386.

It is a super-2 number, since 2×68308988² = 9332235683168288, which contains 22 as substring.

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, 32738 + ... + 34761.

It is an arithmetic number, because the mean of its divisors is an integer number (5670000).

Almost surely, 2^68308988 is an apocalyptic number.

It is an amenable number.

68308988 is a deficient number, since it is larger than the sum of its proper divisors (67771012).

68308988 is a wasteful number, since it uses less digits than its factorization.

68308988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67537 (or 67535 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 68308988 is about 8264.9251660254. The cubic root of 68308988 is about 408.7828028427.

It can be divided in two parts, 68308 and 988, that added together give a palindrome (69296).

The spelling of 68308988 in words is "sixty-eight million, three hundred eight thousand, nine hundred eighty-eight".