284385989880 has 128 divisors (see below), whose sum is σ = 1003715323200. Its totient is φ = 71375302656.

The previous prime is 284385989861. The next prime is 284385989887. The reversal of 284385989880 is 88989583482.

It is a happy number.

284385989880 is a `hidden beast` number, since 2 + 84 + 385 + 9 + 8 + 98 + 80 = 666.

284385989880 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 284385989799 and 284385989808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284385989887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7726357 + ... + 7763076.

Almost surely, 2^284385989880 is an apocalyptic number.

284385989880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

284385989880 is an abundant number, since it is smaller than the sum of its proper divisors (719329333320).

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

284385989880 is a wasteful number, since it uses less digits than its factorization.

284385989880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15489470 (or 15489460 counting only the distinct ones).

The product of its (nonzero) digits is 318504960, while the sum is 72.

The spelling of 284385989880 in words is "two hundred eighty-four billion, three hundred eighty-five million, nine hundred eighty-nine thousand, eight hundred eighty".