68390380 has 12 divisors (see below), whose sum is σ = 143619840. Its totient is φ = 27356144.

The previous prime is 68390353. The next prime is 68390401. The reversal of 68390380 is 8309386.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1709740 + ... + 1709779.

It is an arithmetic number, because the mean of its divisors is an integer number (11968320).

Almost surely, 2^68390380 is an apocalyptic number.

It is an amenable number.

68390380 is an abundant number, since it is smaller than the sum of its proper divisors (75229460).

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

68390380 is a wasteful number, since it uses less digits than its factorization.

68390380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3419528 (or 3419526 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 68390380 is about 8269.8476406763. The cubic root of 68390380 is about 408.9450969757.

The spelling of 68390380 in words is "sixty-eight million, three hundred ninety thousand, three hundred eighty".