68205490 has 16 divisors (see below), whose sum is σ = 122886720. Its totient is φ = 27256240.

The previous prime is 68205481. The next prime is 68205521. The reversal of 68205490 is 9450286.

It is a happy number.

It is a super-2 number, since 2×68205490² = 9303977732280200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10605 + ... + 15775.

It is an arithmetic number, because the mean of its divisors is an integer number (7680420).

Almost surely, 2^68205490 is an apocalyptic number.

68205490 is a deficient number, since it is larger than the sum of its proper divisors (54681230).

68205490 is a wasteful number, since it uses less digits than its factorization.

68205490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6497.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 68205490 is about 8258.6615138290. The cubic root of 68205490 is about 408.5762434550.

The spelling of 68205490 in words is "sixty-eight million, two hundred five thousand, four hundred ninety".