68243992 has 16 divisors (see below), whose sum is σ = 129578400. Its totient is φ = 33689760.

The previous prime is 68243971. The next prime is 68244023. The reversal of 68243992 is 29934286.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53359 + ... + 54622.

It is an arithmetic number, because the mean of its divisors is an integer number (8098650).

Almost surely, 2^68243992 is an apocalyptic number.

It is an amenable number.

68243992 is a deficient number, since it is larger than the sum of its proper divisors (61334408).

68243992 is a wasteful number, since it uses less digits than its factorization.

68243992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108066 (or 108062 counting only the distinct ones).

The product of its digits is 186624, while the sum is 43.

The square root of 68243992 is about 8260.9921922249. The cubic root of 68243992 is about 408.6531094248.

It can be divided in two parts, 6824 and 3992, that added together give a square (10816 = 104²).

The spelling of 68243992 in words is "sixty-eight million, two hundred forty-three thousand, nine hundred ninety-two".