28787569130 has 8 divisors (see below), whose sum is σ = 51817624452. Its totient is φ = 11515027648.

The previous prime is 28787569127. The next prime is 28787569183. The reversal of 28787569130 is 3196578782.

It can be written as a sum of positive squares in 2 ways, for example, as 28633039369 + 154529761 = 169213^2 + 12431^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 1439378447 + ... + 1439378466.

Almost surely, 2^28787569130 is an apocalyptic number.

28787569130 is a deficient number, since it is larger than the sum of its proper divisors (23030055322).

28787569130 is a wasteful number, since it uses less digits than its factorization.

28787569130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2878756920.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 28787569130 in words is "twenty-eight billion, seven hundred eighty-seven million, five hundred sixty-nine thousand, one hundred thirty".