287115438 has 16 divisors (see below), whose sum is σ = 575134416. Its totient is φ = 95554560.

The previous prime is 287115419. The next prime is 287115443. The reversal of 287115438 is 834511782.

It is a junction number, because it is equal to n+sod(n) for n = 287115396 and 287115405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33481 + ... + 41172.

It is an arithmetic number, because the mean of its divisors is an integer number (35945901).

Almost surely, 2^287115438 is an apocalyptic number.

287115438 is an abundant number, since it is smaller than the sum of its proper divisors (288018978).

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

287115438 is a wasteful number, since it uses less digits than its factorization.

287115438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75299.

The product of its digits is 53760, while the sum is 39.

The square root of 287115438 is about 16944.4810484122. The cubic root of 287115438 is about 659.7086546971.

The spelling of 287115438 in words is "two hundred eighty-seven million, one hundred fifteen thousand, four hundred thirty-eight".