68399432 has 16 divisors (see below), whose sum is σ = 135793260. Its totient is φ = 32187904.

The previous prime is 68399431. The next prime is 68399473. The reversal of 68399432 is 23499386.

It can be written as a sum of positive squares in 2 ways, for example, as 51638596 + 16760836 = 7186^2 + 4094^2 .

It is not an unprimeable number, because it can be changed into a prime (68399431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251333 + ... + 251604.

Almost surely, 2^68399432 is an apocalyptic number.

It is an amenable number.

68399432 is a deficient number, since it is larger than the sum of its proper divisors (67393828).

68399432 is a wasteful number, since it uses less digits than its factorization.

68399432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502960 (or 502956 counting only the distinct ones).

The product of its digits is 279936, while the sum is 44.

The square root of 68399432 is about 8270.3949119737. The cubic root of 68399432 is about 408.9631385370.

The spelling of 68399432 in words is "sixty-eight million, three hundred ninety-nine thousand, four hundred thirty-two".