383978844 has 72 divisors (see below), whose sum is σ = 992038320. Its totient is φ = 125190912.

The previous prime is 383978831. The next prime is 383978849. The reversal of 383978844 is 448879383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383978849) 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, 622024 + ... + 622640.

It is an arithmetic number, because the mean of its divisors is an integer number (13778310).

Almost surely, 2^383978844 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 383978844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496019160).

383978844 is an abundant number, since it is smaller than the sum of its proper divisors (608059476).

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

383978844 is a wasteful number, since it uses less digits than its factorization.

383978844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979 (or 974 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 383978844 is about 19595.3781285282. The cubic root of 383978844 is about 726.8348886227.

The spelling of 383978844 in words is "three hundred eighty-three million, nine hundred seventy-eight thousand, eight hundred forty-four".