68215930 has 16 divisors (see below), whose sum is σ = 128127744. Its totient is φ = 26099920.

The previous prime is 68215879. The next prime is 68215937. The reversal of 68215930 is 3951286.

It is not an unprimeable number, because it can be changed into a prime (68215937) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 148066 + ... + 148525.

It is an arithmetic number, because the mean of its divisors is an integer number (8007984).

Almost surely, 2^68215930 is an apocalyptic number.

68215930 is a deficient number, since it is larger than the sum of its proper divisors (59911814).

68215930 is a wasteful number, since it uses less digits than its factorization.

68215930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296621.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 68215930 is about 8259.2935533252. The cubic root of 68215930 is about 408.5970888853.

The spelling of 68215930 in words is "sixty-eight million, two hundred fifteen thousand, nine hundred thirty".