389258784 has 144 divisors (see below), whose sum is σ = 1160726112. Its totient is φ = 128314368.

The previous prime is 389258783. The next prime is 389258791. The reversal of 389258784 is 487852983.

It is a happy number.

389258784 is a `hidden beast` number, since 389 + 258 + 7 + 8 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 389258784.

It is not an unprimeable number, because it can be changed into a prime (389258783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 878467 + ... + 878909.

It is an arithmetic number, because the mean of its divisors is an integer number (8060598).

Almost surely, 2^389258784 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 389258784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (580363056).

389258784 is an abundant number, since it is smaller than the sum of its proper divisors (771467328).

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

389258784 is a wasteful number, since it uses less digits than its factorization.

389258784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 561 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 389258784 is about 19729.6422674107. The cubic root of 389258784 is about 730.1512065589.

The spelling of 389258784 in words is "three hundred eighty-nine million, two hundred fifty-eight thousand, seven hundred eighty-four".