68668028 has 24 divisors (see below), whose sum is σ = 141178800. Its totient is φ = 28811520.

The previous prime is 68668013. The next prime is 68668043. The reversal of 68668028 is 82086686.

It is an interprime number because it is at equal distance from previous prime (68668013) and next prime (68668043).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a self number, because there is not a number n which added to its sum of digits gives 68668028.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59453 + ... + 60596.

It is an arithmetic number, because the mean of its divisors is an integer number (5882450).

Almost surely, 2^68668028 is an apocalyptic number.

It is an amenable number.

68668028 is an abundant number, since it is smaller than the sum of its proper divisors (72510772).

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

68668028 is a wasteful number, since it uses less digits than its factorization.

68668028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120077 (or 120075 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 68668028 is about 8286.6174039834. The cubic root of 68668028 is about 409.4977550251.

The spelling of 68668028 in words is "sixty-eight million, six hundred sixty-eight thousand, twenty-eight".