68288004 has 18 divisors (see below), whose sum is σ = 172616990. Its totient is φ = 22762656.

The previous prime is 68287993. The next prime is 68288021. The reversal of 68288004 is 40088286.

It can be written as a sum of positive squares in only one way, i.e., 57790404 + 10497600 = 7602^2 + 3240^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1896889 = 68288004 / (6 + 8 + 2 + 8 + 8 + 0 + 0 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 68288004.

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 5 ways as a sum of consecutive naturals, for example, 948409 + ... + 948480.

Almost surely, 2^68288004 is an apocalyptic number.

It is an amenable number.

68288004 is an abundant number, since it is smaller than the sum of its proper divisors (104328986).

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

68288004 is a wasteful number, since it uses less digits than its factorization.

68288004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896899 (or 1896894 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 68288004 is about 8263.6556075383. The cubic root of 68288004 is about 408.7409402363.

The spelling of 68288004 in words is "sixty-eight million, two hundred eighty-eight thousand, four".