68905028 has 12 divisors (see below), whose sum is σ = 121778412. Its totient is φ = 34111200.

The previous prime is 68905021. The next prime is 68905069. The reversal of 68905028 is 82050986.

It can be written as a sum of positive squares in 2 ways, for example, as 31719424 + 37185604 = 5632^2 + 6098^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68904982 and 68905000.

It is not an unprimeable number, because it can be changed into a prime (68905021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84875 + ... + 85682.

It is an arithmetic number, because the mean of its divisors is an integer number (10148201).

Almost surely, 2^68905028 is an apocalyptic number.

It is an amenable number.

68905028 is a deficient number, since it is larger than the sum of its proper divisors (52873384).

68905028 is a wasteful number, since it uses less digits than its factorization.

68905028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170662 (or 170660 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 68905028 is about 8300.9052518385. The cubic root of 68905028 is about 409.9683259291.

The spelling of 68905028 in words is "sixty-eight million, nine hundred five thousand, twenty-eight".