389283840 has 304 divisors, whose sum is σ = 1509946560. Its totient is φ = 94371840.

The previous prime is 389283827. The next prime is 389283857. The reversal of 389283840 is 48382983.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35389435 + ... + 35389445.

Almost surely, 2^389283840 is an apocalyptic number.

389283840 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 389283840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (754973280).

389283840 is an abundant number, since it is smaller than the sum of its proper divisors (1120662720).

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

389283840 is an frugal number, since it uses more digits than its factorization.

389283840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 389283840 is about 19730.2772408296. The cubic root of 389283840 is about 730.1668724662.

The spelling of 389283840 in words is "three hundred eighty-nine million, two hundred eighty-three thousand, eight hundred forty".