389809000 has 128 divisors (see below), whose sum is σ = 1051315200. Its totient is φ = 132518400.

The previous prime is 389808967. The next prime is 389809009. The reversal of 389809000 is 908983.

389809000 = T₄₇₂ + T₄₇₃ + ... + T₁₃₄₆.

It is not an unprimeable number, because it can be changed into a prime (389809009) 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 31 ways as a sum of consecutive naturals, for example, 1630881 + ... + 1631119.

It is an arithmetic number, because the mean of its divisors is an integer number (8213400).

Almost surely, 2^389809000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389809000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (525657600).

389809000 is an abundant number, since it is smaller than the sum of its proper divisors (661506200).

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

389809000 is a wasteful number, since it uses less digits than its factorization.

389809000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 389809000 is about 19743.5812354294. The cubic root of 389809000 is about 730.4950666975.

The spelling of 389809000 in words is "three hundred eighty-nine million, eight hundred nine thousand".