68223978 has 32 divisors (see below), whose sum is σ = 154840320. Its totient is φ = 22256640.

The previous prime is 68223977. The next prime is 68223983. The reversal of 68223978 is 87932286.

It is a super-2 number, since 2×68223978² = 9309022348288968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68223973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10903 + ... + 15978.

It is an arithmetic number, because the mean of its divisors is an integer number (4838760).

Almost surely, 2^68223978 is an apocalyptic number.

68223978 is an abundant number, since it is smaller than the sum of its proper divisors (86616342).

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

68223978 is a wasteful number, since it uses less digits than its factorization.

68223978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26939 (or 26933 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 68223978 is about 8259.7807476954. The cubic root of 68223978 is about 408.6131567845.

The spelling of 68223978 in words is "sixty-eight million, two hundred twenty-three thousand, nine hundred seventy-eight".