285998729874 has 64 divisors (see below), whose sum is σ = 690159173760. Its totient is φ = 77837483520.

The previous prime is 285998729869. The next prime is 285998729897. The reversal of 285998729874 is 478927899582.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a self number, because there is not a number n which added to its sum of digits gives 285998729874.

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 31 ways as a sum of consecutive naturals, for example, 4472739 + ... + 4536230.

It is an arithmetic number, because the mean of its divisors is an integer number (10783737090).

Almost surely, 2^285998729874 is an apocalyptic number.

285998729874 is an abundant number, since it is smaller than the sum of its proper divisors (404160443886).

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

285998729874 is a wasteful number, since it uses less digits than its factorization.

285998729874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9009035.

The product of its digits is 1463132160, while the sum is 78.

The spelling of 285998729874 in words is "two hundred eighty-five billion, nine hundred ninety-eight million, seven hundred twenty-nine thousand, eight hundred seventy-four".