284649380 has 48 divisors (see below), whose sum is σ = 627419520. Its totient is φ = 108269568.

The previous prime is 284649367. The next prime is 284649383. The reversal of 284649380 is 83946482.

It is not an unprimeable number, because it can be changed into a prime (284649383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80612 + ... + 84068.

It is an arithmetic number, because the mean of its divisors is an integer number (13071240).

Almost surely, 2^284649380 is an apocalyptic number.

284649380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 284649380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313709760).

284649380 is an abundant number, since it is smaller than the sum of its proper divisors (342770140).

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

284649380 is a wasteful number, since it uses less digits than its factorization.

284649380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3668 (or 3666 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 284649380 is about 16871.5553521304. Note that the first 3 decimals coincide. The cubic root of 284649380 is about 657.8144572830.

The spelling of 284649380 in words is "two hundred eighty-four million, six hundred forty-nine thousand, three hundred eighty".