284390020 has 24 divisors (see below), whose sum is σ = 600058368. Its totient is φ = 113215200.

The previous prime is 284390017. The next prime is 284390021. The reversal of 284390020 is 20093482.

It is not an unprimeable number, because it can be changed into a prime (284390021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29476 + ... + 37915.

It is an arithmetic number, because the mean of its divisors is an integer number (25002432).

Almost surely, 2^284390020 is an apocalyptic number.

284390020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

284390020 is an abundant number, since it is smaller than the sum of its proper divisors (315668348).

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

284390020 is a wasteful number, since it uses less digits than its factorization.

284390020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67611 (or 67609 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 284390020 is about 16863.8672907492. The cubic root of 284390020 is about 657.6146060350.

The spelling of 284390020 in words is "two hundred eighty-four million, three hundred ninety thousand, twenty".