68280820 has 12 divisors (see below), whose sum is σ = 143389764. Its totient is φ = 27312320.

The previous prime is 68280811. The next prime is 68280833. The reversal of 68280820 is 2808286.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16957924 + 51322896 = 4118^2 + 7164^2 .

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, 1707001 + ... + 1707040.

It is an arithmetic number, because the mean of its divisors is an integer number (11949147).

Almost surely, 2^68280820 is an apocalyptic number.

It is an amenable number.

68280820 is an abundant number, since it is smaller than the sum of its proper divisors (75108944).

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

68280820 is a wasteful number, since it uses less digits than its factorization.

68280820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414050 (or 3414048 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 68280820 is about 8263.2209216503. The cubic root of 68280820 is about 408.7266063479.

The spelling of 68280820 in words is "sixty-eight million, two hundred eighty thousand, eight hundred twenty".