68408290 has 16 divisors (see below), whose sum is σ = 123435000. Its totient is φ = 27296640.

The previous prime is 68408281. The next prime is 68408297. The reversal of 68408290 is 9280486.

It can be written as a sum of positive squares in 4 ways, for example, as 35034561 + 33373729 = 5919^2 + 5777^2 .

It is not an unprimeable number, because it can be changed into a prime (68408297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3915 + ... + 12334.

Almost surely, 2^68408290 is an apocalyptic number.

68408290 is a deficient number, since it is larger than the sum of its proper divisors (55026710).

68408290 is a wasteful number, since it uses less digits than its factorization.

68408290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16677.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 68408290 is about 8270.9304192455. The cubic root of 68408290 is about 408.9807918957.

The spelling of 68408290 in words is "sixty-eight million, four hundred eight thousand, two hundred ninety".