68402906 has 16 divisors (see below), whose sum is σ = 120542688. Its totient is φ = 28700400.

The previous prime is 68402903. The next prime is 68402921. The reversal of 68402906 is 60920486.

It is not an unprimeable number, because it can be changed into a prime (68402903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119300 + ... + 119871.

It is an arithmetic number, because the mean of its divisors is an integer number (7533918).

Almost surely, 2^68402906 is an apocalyptic number.

68402906 is a deficient number, since it is larger than the sum of its proper divisors (52139782).

68402906 is a wasteful number, since it uses less digits than its factorization.

68402906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239197.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 68402906 is about 8270.6049355534. The cubic root of 68402906 is about 408.9700621515.

The spelling of 68402906 in words is "sixty-eight million, four hundred two thousand, nine hundred six".