390919806 has 12 divisors (see below), whose sum is σ = 846992952. Its totient is φ = 130306596.

The previous prime is 390919801. The next prime is 390919807. The reversal of 390919806 is 608919093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390919801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10858866 + ... + 10858901.

It is an arithmetic number, because the mean of its divisors is an integer number (70582746).

Almost surely, 2^390919806 is an apocalyptic number.

390919806 is an abundant number, since it is smaller than the sum of its proper divisors (456073146).

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

390919806 is a wasteful number, since it uses less digits than its factorization.

390919806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21717775 (or 21717772 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 390919806 is about 19771.6920368490. The cubic root of 390919806 is about 731.1882854776.

The spelling of 390919806 in words is "three hundred ninety million, nine hundred nineteen thousand, eight hundred six".