68109028 has 36 divisors (see below), whose sum is σ = 131568948. Its totient is φ = 30825600.

The previous prime is 68109017. The next prime is 68109079. The reversal of 68109028 is 82090186.

It can be written as a sum of positive squares in 6 ways, for example, as 16957924 + 51151104 = 4118^2 + 7152^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68108984 and 68109002.

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 11 ways as a sum of consecutive naturals, for example, 34878 + ... + 36778.

It is an arithmetic number, because the mean of its divisors is an integer number (3654693).

Almost surely, 2^68109028 is an apocalyptic number.

It is an amenable number.

68109028 is a deficient number, since it is larger than the sum of its proper divisors (63459920).

68109028 is a wasteful number, since it uses less digits than its factorization.

68109028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984 (or 1969 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 68109028 is about 8252.8193970303. The cubic root of 68109028 is about 408.3835381650.

The spelling of 68109028 in words is "sixty-eight million, one hundred nine thousand, twenty-eight".