68390404 has 12 divisors (see below), whose sum is σ = 120487500. Its totient is φ = 33965408.

The previous prime is 68390401. The next prime is 68390417. The reversal of 68390404 is 40409386.

It can be written as a sum of positive squares in 2 ways, for example, as 12110400 + 56280004 = 3480^2 + 7502^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68390404.

It is not an unprimeable number, because it can be changed into a prime (68390401) 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, 56779 + ... + 57970.

It is an arithmetic number, because the mean of its divisors is an integer number (10040625).

Almost surely, 2^68390404 is an apocalyptic number.

It is an amenable number.

68390404 is a deficient number, since it is larger than the sum of its proper divisors (52097096).

68390404 is a wasteful number, since it uses less digits than its factorization.

68390404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114902 (or 114900 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 68390404 is about 8269.8490917308. The cubic root of 68390404 is about 408.9451448122.

The spelling of 68390404 in words is "sixty-eight million, three hundred ninety thousand, four hundred four".