68658040 has 32 divisors (see below), whose sum is σ = 168525360. Its totient is φ = 24966400.

The previous prime is 68658011. The next prime is 68658041. The reversal of 68658040 is 4085686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68658041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77581 + ... + 78460.

Almost surely, 2^68658040 is an apocalyptic number.

It is an amenable number.

68658040 is an abundant number, since it is smaller than the sum of its proper divisors (99867320).

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

68658040 is a wasteful number, since it uses less digits than its factorization.

68658040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156063 (or 156059 counting only the distinct ones).

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

The square root of 68658040 is about 8286.0147236171. The cubic root of 68658040 is about 409.4778997785.

The spelling of 68658040 in words is "sixty-eight million, six hundred fifty-eight thousand, forty".