68217790 has 16 divisors (see below), whose sum is σ = 129255120. Its totient is φ = 25850880.

The previous prime is 68217781. The next prime is 68217803. The reversal of 68217790 is 9771286.

It is a congruent number.

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, 179331 + ... + 179710.

It is an arithmetic number, because the mean of its divisors is an integer number (8078445).

Almost surely, 2^68217790 is an apocalyptic number.

68217790 is a deficient number, since it is larger than the sum of its proper divisors (61037330).

68217790 is a wasteful number, since it uses less digits than its factorization.

68217790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359067.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 68217790 is about 8259.4061529870. The cubic root of 68217790 is about 408.6008025031.

The spelling of 68217790 in words is "sixty-eight million, two hundred seventeen thousand, seven hundred ninety".