285856406836 has 96 divisors (see below), whose sum is σ = 707013457920. Its totient is φ = 97394659200.

The previous prime is 285856406789. The next prime is 285856406839. The reversal of 285856406836 is 638604658582.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285856406839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1802680 + ... + 1954831.

It is an arithmetic number, because the mean of its divisors is an integer number (7364723520).

Almost surely, 2^285856406836 is an apocalyptic number.

285856406836 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

285856406836 is an abundant number, since it is smaller than the sum of its proper divisors (421157051084).

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

285856406836 is a wasteful number, since it uses less digits than its factorization.

285856406836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3757565 (or 3757563 counting only the distinct ones).

The product of its (nonzero) digits is 66355200, while the sum is 61.

The spelling of 285856406836 in words is "two hundred eighty-five billion, eight hundred fifty-six million, four hundred six thousand, eight hundred thirty-six".