287213858646 has 32 divisors (see below), whose sum is σ = 674852145408. Its totient is φ = 80339540640.

The previous prime is 287213858627. The next prime is 287213858647. The reversal of 287213858646 is 646858312782.

It is a self number, because there is not a number n which added to its sum of digits gives 287213858646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287213858647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167373186 + ... + 167374901.

It is an arithmetic number, because the mean of its divisors is an integer number (21089129544).

Almost surely, 2^287213858646 is an apocalyptic number.

287213858646 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

287213858646 is an abundant number, since it is smaller than the sum of its proper divisors (387638286762).

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

287213858646 is a wasteful number, since it uses less digits than its factorization.

287213858646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334748116.

The product of its digits is 30965760, while the sum is 60.

The spelling of 287213858646 in words is "two hundred eighty-seven billion, two hundred thirteen million, eight hundred fifty-eight thousand, six hundred forty-six".