68686040 has 16 divisors (see below), whose sum is σ = 154543680. Its totient is φ = 27474400.

The previous prime is 68686021. The next prime is 68686063. The reversal of 68686040 is 4068686.

It is a junction number, because it is equal to n+sod(n) for n = 68685985 and 68686003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 858536 + ... + 858615.

It is an arithmetic number, because the mean of its divisors is an integer number (9658980).

Almost surely, 2^68686040 is an apocalyptic number.

It is an amenable number.

68686040 is an abundant number, since it is smaller than the sum of its proper divisors (85857640).

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

68686040 is a wasteful number, since it uses less digits than its factorization.

68686040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717162 (or 1717158 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 68686040 is about 8287.7041452986. The cubic root of 68686040 is about 409.5335563967.

The spelling of 68686040 in words is "sixty-eight million, six hundred eighty-six thousand, forty".