68083990 has 32 divisors (see below), whose sum is σ = 132612480. Its totient is φ = 25017984.

The previous prime is 68083957. The next prime is 68084039. The reversal of 68083990 is 9938086.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 28627 + ... + 30913.

It is an arithmetic number, because the mean of its divisors is an integer number (4144140).

Almost surely, 2^68083990 is an apocalyptic number.

68083990 is a deficient number, since it is larger than the sum of its proper divisors (64528490).

68083990 is a wasteful number, since it uses less digits than its factorization.

68083990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 68083990 is about 8251.3023214521. The cubic root of 68083990 is about 408.3334891943. Note that the first 3 decimals are identical.

The spelling of 68083990 in words is "sixty-eight million, eighty-three thousand, nine hundred ninety".