68890780 has 24 divisors (see below), whose sum is σ = 165338208. Its totient is φ = 23619648.

The previous prime is 68890753. The next prime is 68890793. The reversal of 68890780 is 8709886.

It is a self number, because there is not a number n which added to its sum of digits gives 68890780.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245899 + ... + 246178.

It is an arithmetic number, because the mean of its divisors is an integer number (6889092).

Almost surely, 2^68890780 is an apocalyptic number.

It is an amenable number.

68890780 is an abundant number, since it is smaller than the sum of its proper divisors (96447428).

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

68890780 is a wasteful number, since it uses less digits than its factorization.

68890780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492093 (or 492091 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 68890780 is about 8300.0469878188. The cubic root of 68890780 is about 409.9400665914.

The spelling of 68890780 in words is "sixty-eight million, eight hundred ninety thousand, seven hundred eighty".