384644980 has 48 divisors (see below), whose sum is σ = 837728640. Its totient is φ = 148176000.

The previous prime is 384644971. The next prime is 384644999. The reversal of 384644980 is 89446483.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 384644980.

It is a congruent 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, 365455 + ... + 366505.

It is an arithmetic number, because the mean of its divisors is an integer number (17452680).

Almost surely, 2^384644980 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 384644980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418864320).

384644980 is an abundant number, since it is smaller than the sum of its proper divisors (453083660).

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

384644980 is a wasteful number, since it uses less digits than its factorization.

384644980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720 (or 1718 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 46.

The square root of 384644980 is about 19612.3680365223. The cubic root of 384644980 is about 727.2549561851.

The spelling of 384644980 in words is "three hundred eighty-four million, six hundred forty-four thousand, nine hundred eighty".