287113885 has 16 divisors (see below), whose sum is σ = 350928432. Its totient is φ = 225446400.

The previous prime is 287113861. The next prime is 287113933. The reversal of 287113885 is 588311782.

It can be written as a sum of positive squares in 8 ways, for example, as 93180409 + 193933476 = 9653^2 + 13926^2 .

It is not a de Polignac number, because 287113885 - 2¹¹ = 287111837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231487 + ... + 232723.

It is an arithmetic number, because the mean of its divisors is an integer number (21933027).

Almost surely, 2^287113885 is an apocalyptic number.

It is an amenable number.

287113885 is a deficient number, since it is larger than the sum of its proper divisors (63814547).

287113885 is a wasteful number, since it uses less digits than its factorization.

287113885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064.

The product of its digits is 107520, while the sum is 43.

The square root of 287113885 is about 16944.4352222197. The cubic root of 287113885 is about 659.7074652459.

The spelling of 287113885 in words is "two hundred eighty-seven million, one hundred thirteen thousand, eight hundred eighty-five".