284839140 has 48 divisors (see below), whose sum is σ = 799972992. Its totient is φ = 75726336.

The previous prime is 284839123. The next prime is 284839141. The reversal of 284839140 is 41938482.

It is a super-2 number, since 2×284839140² = 162266671351879200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (284839141) 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, 13177 + ... + 27263.

It is an arithmetic number, because the mean of its divisors is an integer number (16666104).

Almost surely, 2^284839140 is an apocalyptic number.

284839140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

284839140 is an abundant number, since it is smaller than the sum of its proper divisors (515133852).

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

284839140 is a wasteful number, since it uses less digits than its factorization.

284839140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14436 (or 14434 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 284839140 is about 16877.1780816581. The cubic root of 284839140 is about 657.9606009860.

The spelling of 284839140 in words is "two hundred eighty-four million, eight hundred thirty-nine thousand, one hundred forty".