389090520 has 512 divisors, whose sum is σ = 1654732800. Its totient is φ = 79128576.

The previous prime is 389090503. The next prime is 389090521. The reversal of 389090520 is 25090983.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389090521) 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 127 ways as a sum of consecutive naturals, for example, 3636307 + ... + 3636413.

It is an arithmetic number, because the mean of its divisors is an integer number (3231900).

Almost surely, 2^389090520 is an apocalyptic number.

389090520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389090520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (827366400).

389090520 is an abundant number, since it is smaller than the sum of its proper divisors (1265642280).

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

389090520 is a wasteful number, since it uses less digits than its factorization.

389090520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 389090520 is about 19725.3775629264. The cubic root of 389090520 is about 730.0459844680.

The spelling of 389090520 in words is "three hundred eighty-nine million, ninety thousand, five hundred twenty".