389787984 has 160 divisors (see below), whose sum is σ = 1168675200. Its totient is φ = 124277760.

The previous prime is 389787973. The next prime is 389788013. The reversal of 389787984 is 489787983.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1044822 + ... + 1045194.

It is an arithmetic number, because the mean of its divisors is an integer number (7304220).

Almost surely, 2^389787984 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 389787984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (584337600).

389787984 is an abundant number, since it is smaller than the sum of its proper divisors (778887216).

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

389787984 is a wasteful number, since it uses less digits than its factorization.

389787984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 478 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The square root of 389787984 is about 19743.0490046497. The cubic root of 389787984 is about 730.4819385927.

Subtracting 389787984 from its reverse (489787983), we obtain a palindrome (99999999).

The spelling of 389787984 in words is "three hundred eighty-nine million, seven hundred eighty-seven thousand, nine hundred eighty-four".