384979820 has 48 divisors (see below), whose sum is σ = 848050560. Its totient is φ = 146628864.

The previous prime is 384979801. The next prime is 384979849. The reversal of 384979820 is 28979483.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29246 + ... + 40314.

It is an arithmetic number, because the mean of its divisors is an integer number (17667720).

Almost surely, 2^384979820 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 384979820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (424025280).

384979820 is an abundant number, since it is smaller than the sum of its proper divisors (463070740).

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

384979820 is a wasteful number, since it uses less digits than its factorization.

384979820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11162 (or 11160 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 384979820 is about 19620.9026295938. The cubic root of 384979820 is about 727.4659242511.

The spelling of 384979820 in words is "three hundred eighty-four million, nine hundred seventy-nine thousand, eight hundred twenty".