284344866 has 72 divisors (see below), whose sum is σ = 671791536. Its totient is φ = 86879520.

The previous prime is 284344859. The next prime is 284344891. The reversal of 284344866 is 668443482.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 641641 + ... + 642083.

It is an arithmetic number, because the mean of its divisors is an integer number (9330438).

Almost surely, 2^284344866 is an apocalyptic number.

284344866 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 284344866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335895768).

284344866 is an abundant number, since it is smaller than the sum of its proper divisors (387446670).

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

284344866 is a wasteful number, since it uses less digits than its factorization.

284344866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 672 counting only the distinct ones).

The product of its digits is 884736, while the sum is 45.

The square root of 284344866 is about 16862.5284580931. The cubic root of 284344866 is about 657.5797999594.

The spelling of 284344866 in words is "two hundred eighty-four million, three hundred forty-four thousand, eight hundred sixty-six".