28687243330 has 32 divisors (see below), whose sum is σ = 52117705584. Its totient is φ = 11368175616.

The previous prime is 28687243279. The next prime is 28687243363. The reversal of 28687243330 is 3334278682.

It can be written as a sum of positive squares in 8 ways, for example, as 10974029049 + 17713214281 = 104757^2 + 133091^2 .

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, 3332592 + ... + 3341188.

Almost surely, 2^28687243330 is an apocalyptic number.

28687243330 is a deficient number, since it is larger than the sum of its proper divisors (23430462254).

28687243330 is a wasteful number, since it uses less digits than its factorization.

28687243330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11670.

The product of its (nonzero) digits is 1161216, while the sum is 46.

The spelling of 28687243330 in words is "twenty-eight billion, six hundred eighty-seven million, two hundred forty-three thousand, three hundred thirty".