389240208 has 80 divisors (see below), whose sum is σ = 1276882560. Its totient is φ = 111210624.

The previous prime is 389240197. The next prime is 389240221. The reversal of 389240208 is 802042983.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61335 + ... + 67382.

It is an arithmetic number, because the mean of its divisors is an integer number (15961032).

Almost surely, 2^389240208 is an apocalyptic number.

It is an amenable number.

389240208 is an abundant number, since it is smaller than the sum of its proper divisors (887642352).

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

389240208 is a wasteful number, since it uses less digits than its factorization.

389240208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128741 (or 128729 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 389240208 is about 19729.1714980635. The cubic root of 389240208 is about 730.1395917453.

It can be divided in two parts, 3892 and 40208, that added together give a square (44100 = 210²).

The spelling of 389240208 in words is "three hundred eighty-nine million, two hundred forty thousand, two hundred eight".