390989895 has 8 divisors (see below), whose sum is σ = 625583856. Its totient is φ = 208527936.

The previous prime is 390989891. The next prime is 390989933. The reversal of 390989895 is 598989093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 390989895 - 2² = 390989891 is a prime.

It is a super-2 number, since 2×390989895² = 305746195984222050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390989891) by changing a digit.

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, 13032982 + ... + 13033011.

It is an arithmetic number, because the mean of its divisors is an integer number (78197982).

Almost surely, 2^390989895 is an apocalyptic number.

390989895 is a deficient number, since it is larger than the sum of its proper divisors (234593961).

390989895 is a wasteful number, since it uses less digits than its factorization.

390989895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26066001.

The product of its (nonzero) digits is 6298560, while the sum is 60.

The square root of 390989895 is about 19773.4644157264. The cubic root of 390989895 is about 731.2319817315.

The spelling of 390989895 in words is "three hundred ninety million, nine hundred eighty-nine thousand, eight hundred ninety-five".