68420842 has 16 divisors (see below), whose sum is σ = 117401472. Its totient is φ = 29296080.

The previous prime is 68420761. The next prime is 68420857. The reversal of 68420842 is 24802486.

It is a junction number, because it is equal to n+sod(n) for n = 68420798 and 68420807.

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, 23592 + ... + 26332.

It is an arithmetic number, because the mean of its divisors is an integer number (7337592).

Almost surely, 2^68420842 is an apocalyptic number.

68420842 is a deficient number, since it is larger than the sum of its proper divisors (48980630).

68420842 is a wasteful number, since it uses less digits than its factorization.

68420842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4533.

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 68420842 is about 8271.6891866172. The cubic root of 68420842 is about 409.0058045219.

The spelling of 68420842 in words is "sixty-eight million, four hundred twenty thousand, eight hundred forty-two".