68908540 has 24 divisors (see below), whose sum is σ = 146543040. Its totient is φ = 27213888.

The previous prime is 68908523. The next prime is 68908547. The reversal of 68908540 is 4580986.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 68908493 and 68908502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68908547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20227 + ... + 23386.

It is an arithmetic number, because the mean of its divisors is an integer number (6105960).

Almost surely, 2^68908540 is an apocalyptic number.

It is an amenable number.

68908540 is an abundant number, since it is smaller than the sum of its proper divisors (77634500).

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

68908540 is a wasteful number, since it uses less digits than its factorization.

68908540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43701 (or 43699 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 68908540 is about 8301.1167923358. The cubic root of 68908540 is about 409.9752909956.

The spelling of 68908540 in words is "sixty-eight million, nine hundred eight thousand, five hundred forty".