68421744 has 30 divisors (see below), whose sum is σ = 191486256. Its totient is φ = 22807200.

The previous prime is 68421733. The next prime is 68421761. The reversal of 68421744 is 44712486.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 68421699 and 68421708.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 237432 + ... + 237719.

Almost surely, 2^68421744 is an apocalyptic number.

It is an amenable number.

68421744 is an abundant number, since it is smaller than the sum of its proper divisors (123064512).

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

68421744 is a wasteful number, since it uses less digits than its factorization.

68421744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475165 (or 475156 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 68421744 is about 8271.7437097628. The cubic root of 68421744 is about 409.0076018378.

The spelling of 68421744 in words is "sixty-eight million, four hundred twenty-one thousand, seven hundred forty-four".