68907040 has 48 divisors (see below), whose sum is σ = 163500120. Its totient is φ = 27443200.

The previous prime is 68907031. The next prime is 68907067. The reversal of 68907040 is 4070986.

It can be written as a sum of positive squares in 4 ways, for example, as 60403984 + 8503056 = 7772^2 + 2916^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68906987 and 68907005.

It is a congruent number.

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, 42240 + ... + 43840.

Almost surely, 2^68907040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68907040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81750060).

68907040 is an abundant number, since it is smaller than the sum of its proper divisors (94593080).

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

68907040 is a wasteful number, since it uses less digits than its factorization.

68907040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885 (or 1877 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 68907040 is about 8301.0264425552. The cubic root of 68907040 is about 409.9723161954.

The spelling of 68907040 in words is "sixty-eight million, nine hundred seven thousand, forty".