284240990985 has 32 divisors (see below), whose sum is σ = 528564372480. Its totient is φ = 127736384448.

The previous prime is 284240990939. The next prime is 284240990993. The reversal of 284240990985 is 589099042482.

It is not a de Polignac number, because 284240990985 - 2¹⁷ = 284240859913 is a prime.

It is a super-2 number, since 2×284240990985² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22934967 + ... + 22947356.

It is an arithmetic number, because the mean of its divisors is an integer number (16517636640).

Almost surely, 2^284240990985 is an apocalyptic number.

It is an amenable number.

284240990985 is a deficient number, since it is larger than the sum of its proper divisors (244323381495).

284240990985 is a wasteful number, since it uses less digits than its factorization.

284240990985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45882397.

The product of its (nonzero) digits is 14929920, while the sum is 60.

The spelling of 284240990985 in words is "two hundred eighty-four billion, two hundred forty million, nine hundred ninety thousand, nine hundred eighty-five".