68409930 has 16 divisors (see below), whose sum is σ = 164183904. Its totient is φ = 18242640.

The previous prime is 68409917. The next prime is 68409931. The reversal of 68409930 is 3990486.

It is not an unprimeable number, because it can be changed into a prime (68409931) 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, 1140136 + ... + 1140195.

It is an arithmetic number, because the mean of its divisors is an integer number (10261494).

Almost surely, 2^68409930 is an apocalyptic number.

68409930 is an abundant number, since it is smaller than the sum of its proper divisors (95773974).

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

68409930 is a wasteful number, since it uses less digits than its factorization.

68409930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2280341.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 68409930 is about 8271.0295610643. The cubic root of 68409930 is about 408.9840601309.

The spelling of 68409930 in words is "sixty-eight million, four hundred nine thousand, nine hundred thirty".