389855890 has 16 divisors (see below), whose sum is σ = 701985600. Its totient is φ = 155887920.

The previous prime is 389855887. The next prime is 389855899. The reversal of 389855890 is 98558983.

It is a super-2 number, since 2×389855890² = 303975229935384200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (389855899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36235 + ... + 45745.

It is an arithmetic number, because the mean of its divisors is an integer number (43874100).

Almost surely, 2^389855890 is an apocalyptic number.

389855890 is a deficient number, since it is larger than the sum of its proper divisors (312129710).

389855890 is a wasteful number, since it uses less digits than its factorization.

389855890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13617.

The product of its (nonzero) digits is 3110400, while the sum is 55.

The square root of 389855890 is about 19744.7686742590. The cubic root of 389855890 is about 730.5243558625.

The spelling of 389855890 in words is "three hundred eighty-nine million, eight hundred fifty-five thousand, eight hundred ninety".