390123830 has 16 divisors (see below), whose sum is σ = 709042464. Its totient is φ = 154534080.

The previous prime is 390123817. The next prime is 390123841. The reversal of 390123830 is 38321093.

It is a junction number, because it is equal to n+sod(n) for n = 390123793 and 390123802.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 188351 + ... + 190410.

It is an arithmetic number, because the mean of its divisors is an integer number (44315154).

Almost surely, 2^390123830 is an apocalyptic number.

390123830 is a deficient number, since it is larger than the sum of its proper divisors (318918634).

390123830 is a wasteful number, since it uses less digits than its factorization.

390123830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378871.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 390123830 is about 19751.5525972011. The cubic root of 390123830 is about 730.6916756988.

The spelling of 390123830 in words is "three hundred ninety million, one hundred twenty-three thousand, eight hundred thirty".