68506840 has 32 divisors (see below), whose sum is σ = 154560960. Its totient is φ = 27328000.

The previous prime is 68506831. The next prime is 68506853. The reversal of 68506840 is 4860586.

It is a self number, because there is not a number n which added to its sum of digits gives 68506840.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13905 + ... + 18175.

It is an arithmetic number, because the mean of its divisors is an integer number (4830030).

Almost surely, 2^68506840 is an apocalyptic number.

It is an amenable number.

68506840 is an abundant number, since it is smaller than the sum of its proper divisors (86054120).

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

68506840 is a wasteful number, since it uses less digits than its factorization.

68506840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4683 (or 4679 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 68506840 is about 8276.8858878204. The cubic root of 68506840 is about 409.1770922653.

The spelling of 68506840 in words is "sixty-eight million, five hundred six thousand, eight hundred forty".