68087840 has 24 divisors (see below), whose sum is σ = 160857900. Its totient is φ = 27235072.

The previous prime is 68087827. The next prime is 68087861. The reversal of 68087840 is 4878086.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66520336 + 1567504 = 8156^2 + 1252^2 .

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, 212615 + ... + 212934.

Almost surely, 2^68087840 is an apocalyptic number.

It is an amenable number.

68087840 is an abundant number, since it is smaller than the sum of its proper divisors (92770060).

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

68087840 is a wasteful number, since it uses less digits than its factorization.

68087840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425564 (or 425556 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 68087840 is about 8251.5356146599. The cubic root of 68087840 is about 408.3411858363.

The spelling of 68087840 in words is "sixty-eight million, eighty-seven thousand, eight hundred forty".