68431844 has 24 divisors (see below), whose sum is σ = 135757440. Its totient is φ = 29921184.

The previous prime is 68431807. The next prime is 68431889. The reversal of 68431844 is 44813486.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 68431798 and 68431807.

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, 33644 + ... + 35619.

It is an arithmetic number, because the mean of its divisors is an integer number (5656560).

Almost surely, 2^68431844 is an apocalyptic number.

It is an amenable number.

68431844 is a deficient number, since it is larger than the sum of its proper divisors (67325596).

68431844 is a wasteful number, since it uses less digits than its factorization.

68431844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69299 (or 69297 counting only the distinct ones).

The product of its digits is 73728, while the sum is 38.

The square root of 68431844 is about 8272.3541993800. The cubic root of 68431844 is about 409.0277259158.

The spelling of 68431844 in words is "sixty-eight million, four hundred thirty-one thousand, eight hundred forty-four".