28700744387 has 16 divisors (see below), whose sum is σ = 33533922240. Its totient is φ = 24054006912.

The previous prime is 28700744357. The next prime is 28700744407. The reversal of 28700744387 is 78344700782.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28700744387 - 2²⁶ = 28633635523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28700744357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23312 + ... + 240717.

It is an arithmetic number, because the mean of its divisors is an integer number (2095870140).

Almost surely, 2^28700744387 is an apocalyptic number.

28700744387 is a deficient number, since it is larger than the sum of its proper divisors (4833177853).

28700744387 is a wasteful number, since it uses less digits than its factorization.

28700744387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264382.

The product of its (nonzero) digits is 2107392, while the sum is 50.

The spelling of 28700744387 in words is "twenty-eight billion, seven hundred million, seven hundred forty-four thousand, three hundred eighty-seven".