284638870 has 8 divisors (see below), whose sum is σ = 512349984. Its totient is φ = 113855544.

The previous prime is 284638831. The next prime is 284638873. The reversal of 284638870 is 78836482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 284638870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (284638873) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 14231934 + ... + 14231953.

It is an arithmetic number, because the mean of its divisors is an integer number (64043748).

Almost surely, 2^284638870 is an apocalyptic number.

284638870 is a deficient number, since it is larger than the sum of its proper divisors (227711114).

284638870 is a wasteful number, since it uses less digits than its factorization.

284638870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28463894.

The product of its (nonzero) digits is 516096, while the sum is 46.

The square root of 284638870 is about 16871.2438782681. The cubic root of 284638870 is about 657.8063611063.

The spelling of 284638870 in words is "two hundred eighty-four million, six hundred thirty-eight thousand, eight hundred seventy".