68221938 has 16 divisors (see below), whose sum is σ = 136689696. Its totient is φ = 22699680.

The previous prime is 68221927. The next prime is 68221981. The reversal of 68221938 is 83912286.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 68221896 and 68221905.

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, 6531 + ... + 13382.

It is an arithmetic number, because the mean of its divisors is an integer number (8543106).

Almost surely, 2^68221938 is an apocalyptic number.

68221938 is an abundant number, since it is smaller than the sum of its proper divisors (68467758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68221938 is a wasteful number, since it uses less digits than its factorization.

68221938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20489.

The product of its digits is 41472, while the sum is 39.

The square root of 68221938 is about 8259.6572568116. The cubic root of 68221938 is about 408.6090840270.

The spelling of 68221938 in words is "sixty-eight million, two hundred twenty-one thousand, nine hundred thirty-eight".