68019992 has 32 divisors (see below), whose sum is σ = 135464400. Its totient is φ = 31908864.

The previous prime is 68019961. The next prime is 68020031. The reversal of 68019992 is 29991086.

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, 59684 + ... + 60812.

Almost surely, 2^68019992 is an apocalyptic number.

It is an amenable number.

68019992 is a deficient number, since it is larger than the sum of its proper divisors (67444408).

68019992 is a wasteful number, since it uses less digits than its factorization.

68019992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595 (or 1591 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 68019992 is about 8247.4233552062. The cubic root of 68019992 is about 408.2055064924.

The spelling of 68019992 in words is "sixty-eight million, nineteen thousand, nine hundred ninety-two".