68450090 has 8 divisors (see below), whose sum is σ = 123210180. Its totient is φ = 27380032.

The previous prime is 68450071. The next prime is 68450099. The reversal of 68450090 is 9005486.

It can be written as a sum of positive squares in 2 ways, for example, as 66373609 + 2076481 = 8147^2 + 1441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (68450099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3422495 + ... + 3422514.

Almost surely, 2^68450090 is an apocalyptic number.

68450090 is a deficient number, since it is larger than the sum of its proper divisors (54760090).

68450090 is a wasteful number, since it uses less digits than its factorization.

68450090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6845016.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 68450090 is about 8273.4569558317. The cubic root of 68450090 is about 409.0640757409.

The spelling of 68450090 in words is "sixty-eight million, four hundred fifty thousand, ninety".