284387980 has 12 divisors (see below), whose sum is σ = 597214800. Its totient is φ = 113755184.

The previous prime is 284387977. The next prime is 284387981. The reversal of 284387980 is 89783482.

It is not an unprimeable number, because it can be changed into a prime (284387981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7109680 + ... + 7109719.

It is an arithmetic number, because the mean of its divisors is an integer number (49767900).

Almost surely, 2^284387980 is an apocalyptic number.

284387980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

284387980 is an abundant number, since it is smaller than the sum of its proper divisors (312826820).

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

284387980 is a wasteful number, since it uses less digits than its factorization.

284387980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14219408 (or 14219406 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 284387980 is about 16863.8068062938. The cubic root of 284387980 is about 657.6130336204.

The spelling of 284387980 in words is "two hundred eighty-four million, three hundred eighty-seven thousand, nine hundred eighty".