68188688 has 10 divisors (see below), whose sum is σ = 132115614. Its totient is φ = 34094336.

The previous prime is 68188651. The next prime is 68188697. The reversal of 68188688 is 88688186.

It can be written as a sum of positive squares in only one way, i.e., 35378704 + 32809984 = 5948^2 + 5728^2 .

It is a super-2 number, since 2×68188688² = 9299394342322688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2130881 + ... + 2130912.

Almost surely, 2^68188688 is an apocalyptic number.

It is an amenable number.

68188688 is a deficient number, since it is larger than the sum of its proper divisors (63926926).

68188688 is a wasteful number, since it uses less digits than its factorization.

68188688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261801 (or 4261795 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 53.

The square root of 68188688 is about 8257.6442161188. The cubic root of 68188688 is about 408.5426906240.

The spelling of 68188688 in words is "sixty-eight million, one hundred eighty-eight thousand, six hundred eighty-eight".