287220874060405 has 32 divisors (see below), whose sum is σ = 376784052019200. Its totient is φ = 209324472698880.

The previous prime is 287220874060381. The next prime is 287220874060433. The reversal of 287220874060405 is 504060478022782.

It is a happy number.

It is not a de Polignac number, because 287220874060405 - 2⁷ = 287220874060277 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 324031105 + ... + 324916294.

It is an arithmetic number, because the mean of its divisors is an integer number (11774501625600).

Almost surely, 2^{287220874060405} is an apocalyptic number.

It is an amenable number.

287220874060405 is a deficient number, since it is larger than the sum of its proper divisors (89563177958795).

287220874060405 is a wasteful number, since it uses less digits than its factorization.

287220874060405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648947589.

The product of its (nonzero) digits is 12042240, while the sum is 55.

The spelling of 287220874060405 in words is "two hundred eighty-seven trillion, two hundred twenty billion, eight hundred seventy-four million, sixty thousand, four hundred five".