68216590 has 16 divisors (see below), whose sum is σ = 132235488. Its totient is φ = 25187616.

The previous prime is 68216557. The next prime is 68216609. The reversal of 68216590 is 9561286.

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 7 ways as a sum of consecutive naturals, for example, 262242 + ... + 262501.

It is an arithmetic number, because the mean of its divisors is an integer number (8264718).

Almost surely, 2^68216590 is an apocalyptic number.

68216590 is a deficient number, since it is larger than the sum of its proper divisors (64018898).

68216590 is a wasteful number, since it uses less digits than its factorization.

68216590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524763.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 68216590 is about 8259.3335082197. Note that the first 3 decimals coincide. The cubic root of 68216590 is about 408.5984066284.

The spelling of 68216590 in words is "sixty-eight million, two hundred sixteen thousand, five hundred ninety".