389428284 has 72 divisors (see below), whose sum is σ = 1066555728. Its totient is φ = 110261760.

The previous prime is 389428279. The next prime is 389428301. The reversal of 389428284 is 482824983.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63514 + ... + 69374.

It is an arithmetic number, because the mean of its divisors is an integer number (14813274).

Almost surely, 2^389428284 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 389428284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (533277864).

389428284 is an abundant number, since it is smaller than the sum of its proper divisors (677127444).

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

389428284 is a wasteful number, since it uses less digits than its factorization.

389428284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5995 (or 5986 counting only the distinct ones).

The product of its digits is 884736, while the sum is 48.

The square root of 389428284 is about 19733.9373668815. The cubic root of 389428284 is about 730.2571709159.

The spelling of 389428284 in words is "three hundred eighty-nine million, four hundred twenty-eight thousand, two hundred eighty-four".