389880540 has 120 divisors (see below), whose sum is σ = 1397834592. Its totient is φ = 89112960.

The previous prime is 389880529. The next prime is 389880541. The reversal of 389880540 is 45088983.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389880541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5851 + ... + 28530.

Almost surely, 2^389880540 is an apocalyptic number.

389880540 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 389880540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698917296).

389880540 is an abundant number, since it is smaller than the sum of its proper divisors (1007954052).

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

389880540 is a wasteful number, since it uses less digits than its factorization.

389880540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34409 (or 34398 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 389880540 is about 19745.3928803658. The cubic root of 389880540 is about 730.5397521891.

The spelling of 389880540 in words is "three hundred eighty-nine million, eight hundred eighty thousand, five hundred forty".