28861133530 has 16 divisors (see below), whose sum is σ = 51952357224. Its totient is φ = 11543938560.

The previous prime is 28861133527. The next prime is 28861133531. The reversal of 28861133530 is 3533116882.

It can be written as a sum of positive squares in 4 ways, for example, as 24947254809 + 3913878721 = 157947^2 + 62561^2 .

It is not an unprimeable number, because it can be changed into a prime (28861133531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239314 + ... + 339106.

Almost surely, 2^28861133530 is an apocalyptic number.

28861133530 is a deficient number, since it is larger than the sum of its proper divisors (23091223694).

28861133530 is a wasteful number, since it uses less digits than its factorization.

28861133530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128721.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 28861133530 in words is "twenty-eight billion, eight hundred sixty-one million, one hundred thirty-three thousand, five hundred thirty".