68121788 has 24 divisors (see below), whose sum is σ = 144258912. Its totient is φ = 27477504.

The previous prime is 68121769. The next prime is 68121803. The reversal of 68121788 is 88712186.

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, 71081 + ... + 72032.

It is an arithmetic number, because the mean of its divisors is an integer number (6010788).

Almost surely, 2^68121788 is an apocalyptic number.

68121788 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

68121788 is an abundant number, since it is smaller than the sum of its proper divisors (76137124).

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

68121788 is a wasteful number, since it uses less digits than its factorization.

68121788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143141 (or 143139 counting only the distinct ones).

The product of its digits is 43008, while the sum is 41.

The square root of 68121788 is about 8253.5924299665. The cubic root of 68121788 is about 408.4090396720.

It can be divided in two parts, 6812178 and 8, that added together give a palindrome (6812186).

The spelling of 68121788 in words is "sixty-eight million, one hundred twenty-one thousand, seven hundred eighty-eight".