68431842 has 12 divisors (see below), whose sum is σ = 148269030. Its totient is φ = 22810608.

The previous prime is 68431807. The next prime is 68431889. The reversal of 68431842 is 24813486.

It can be written as a sum of positive squares in only one way, i.e., 59305401 + 9126441 = 7701^2 + 3021^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68431797 and 68431806.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1900867 + ... + 1900902.

Almost surely, 2^68431842 is an apocalyptic number.

68431842 is an abundant number, since it is smaller than the sum of its proper divisors (79837188).

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

68431842 is a wasteful number, since it uses less digits than its factorization.

68431842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3801777 (or 3801774 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 68431842 is about 8272.3540784954. The cubic root of 68431842 is about 409.0277219310.

The spelling of 68431842 in words is "sixty-eight million, four hundred thirty-one thousand, eight hundred forty-two".