68688402 has 16 divisors (see below), whose sum is σ = 137535840. Its totient is φ = 22869632.

The previous prime is 68688377. The next prime is 68688437. The reversal of 68688402 is 20488686.

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, 588 + ... + 11735.

It is an arithmetic number, because the mean of its divisors is an integer number (8595990).

Almost surely, 2^68688402 is an apocalyptic number.

68688402 is an abundant number, since it is smaller than the sum of its proper divisors (68847438).

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

68688402 is a wasteful number, since it uses less digits than its factorization.

68688402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13257.

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 68688402 is about 8287.8466443341. The cubic root of 68688402 is about 409.5382507381.

The spelling of 68688402 in words is "sixty-eight million, six hundred eighty-eight thousand, four hundred two".