284915831640 has 256 divisors, whose sum is σ = 941026360320. Its totient is φ = 68437923840.

The previous prime is 284915831623. The next prime is 284915831659. The reversal of 284915831640 is 46138519482.

It is a super-2 number, since 2×284915831640² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 82272549 + ... + 82276011.

It is an arithmetic number, because the mean of its divisors is an integer number (3675884220).

Almost surely, 2^284915831640 is an apocalyptic number.

284915831640 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 284915831640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (470513180160).

284915831640 is an abundant number, since it is smaller than the sum of its proper divisors (656110528680).

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

284915831640 is a wasteful number, since it uses less digits than its factorization.

284915831640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042 (or 4038 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 284915831640 in words is "two hundred eighty-four billion, nine hundred fifteen million, eight hundred thirty-one thousand, six hundred forty".