28487787913 has 16 divisors (see below), whose sum is σ = 30822386112. Its totient is φ = 26173800000.

The previous prime is 28487787907. The next prime is 28487787941. The reversal of 28487787913 is 31978778482.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28487787913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28487787953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8550658 + ... + 8553988.

It is an arithmetic number, because the mean of its divisors is an integer number (1926399132).

Almost surely, 2^28487787913 is an apocalyptic number.

It is an amenable number.

28487787913 is a deficient number, since it is larger than the sum of its proper divisors (2334598199).

28487787913 is a wasteful number, since it uses less digits than its factorization.

28487787913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6216.

The product of its digits is 37933056, while the sum is 64.

The spelling of 28487787913 in words is "twenty-eight billion, four hundred eighty-seven million, seven hundred eighty-seven thousand, nine hundred thirteen".