389243090 has 16 divisors (see below), whose sum is σ = 705680640. Its totient is φ = 154576560.

The previous prime is 389243089. The next prime is 389243093. The reversal of 389243090 is 90342983.

It is a super-2 number, since 2×389243090² = 303020366225496200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (389243093) 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, 138626 + ... + 141405.

It is an arithmetic number, because the mean of its divisors is an integer number (44105040).

Almost surely, 2^389243090 is an apocalyptic number.

389243090 is a deficient number, since it is larger than the sum of its proper divisors (316437550).

389243090 is a wasteful number, since it uses less digits than its factorization.

389243090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280177.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 389243090 is about 19729.2445369811. The cubic root of 389243090 is about 730.1413937663.

The spelling of 389243090 in words is "three hundred eighty-nine million, two hundred forty-three thousand, ninety".