284939394820 has 96 divisors (see below), whose sum is σ = 635262840576. Its totient is φ = 107125286400.

The previous prime is 284939394787. The next prime is 284939394821. The reversal of 284939394820 is 28493939482.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is not an unprimeable number, because it can be changed into a prime (284939394821) 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, 31338475 + ... + 31347565.

It is an arithmetic number, because the mean of its divisors is an integer number (6617321256).

Almost surely, 2^284939394820 is an apocalyptic number.

284939394820 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 284939394820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317631420288).

284939394820 is an abundant number, since it is smaller than the sum of its proper divisors (350323445756).

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

284939394820 is a wasteful number, since it uses less digits than its factorization.

284939394820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10301 (or 10299 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 61.

The spelling of 284939394820 in words is "two hundred eighty-four billion, nine hundred thirty-nine million, three hundred ninety-four thousand, eight hundred twenty".