284408890 has 12 divisors (see below), whose sum is σ = 512032014. Its totient is φ = 113742224.

The previous prime is 284408863. The next prime is 284408893. The reversal of 284408890 is 98804482.

It can be written as a sum of positive squares in 3 ways, for example, as 264615289 + 19793601 = 16267^2 + 4449^2 .

It is a super-2 number, since 2×284408890² = 161776833422064200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (284408893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50664 + ... + 55996.

Almost surely, 2^284408890 is an apocalyptic number.

284408890 is a deficient number, since it is larger than the sum of its proper divisors (227623124).

284408890 is an frugal number, since it uses more digits than its factorization.

284408890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10673 (or 5340 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 284408890 is about 16864.4267616780. The cubic root of 284408890 is about 657.6291505130.

The spelling of 284408890 in words is "two hundred eighty-four million, four hundred eight thousand, eight hundred ninety".