68637988 has 12 divisors (see below), whose sum is σ = 120465072. Its totient is φ = 34219400.

The previous prime is 68637979. The next prime is 68638007. The reversal of 68637988 is 88973686.

It is a super-2 number, since 2×68637988² = 9422346793376288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23338 + ... + 26113.

It is an arithmetic number, because the mean of its divisors is an integer number (10038756).

Almost surely, 2^68637988 is an apocalyptic number.

It is an amenable number.

68637988 is a deficient number, since it is larger than the sum of its proper divisors (51827084).

68637988 is a wasteful number, since it uses less digits than its factorization.

68637988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49802 (or 49800 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 55.

The square root of 68637988 is about 8284.8046446491. The cubic root of 68637988 is about 409.4380323897.

The spelling of 68637988 in words is "sixty-eight million, six hundred thirty-seven thousand, nine hundred eighty-eight".