68690388 has 36 divisors (see below), whose sum is σ = 173560128. Its totient is φ = 21134880.

The previous prime is 68690381. The next prime is 68690399. The reversal of 68690388 is 88309686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68690381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14908 + ... + 18963.

Almost surely, 2^68690388 is an apocalyptic number.

It is an amenable number.

68690388 is an abundant number, since it is smaller than the sum of its proper divisors (104869740).

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

68690388 is a wasteful number, since it uses less digits than its factorization.

68690388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33904 (or 33889 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 68690388 is about 8287.9664574611. The cubic root of 68690388 is about 409.5421977175.

The spelling of 68690388 in words is "sixty-eight million, six hundred ninety thousand, three hundred eighty-eight".