28807040487 has 4 divisors (see below), whose sum is σ = 38409387320. Its totient is φ = 19204693656.

The previous prime is 28807040477. The next prime is 28807040497. The reversal of 28807040487 is 78404070882.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (28807040477) and next prime (28807040497).

It is not a de Polignac number, because 28807040487 - 2⁷ = 28807040359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28807040417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4801173412 + ... + 4801173417.

It is an arithmetic number, because the mean of its divisors is an integer number (9602346830).

Almost surely, 2^28807040487 is an apocalyptic number.

28807040487 is a deficient number, since it is larger than the sum of its proper divisors (9602346833).

28807040487 is an equidigital number, since it uses as much as digits as its factorization.

28807040487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9602346832.

The product of its (nonzero) digits is 802816, while the sum is 48.

The spelling of 28807040487 in words is "twenty-eight billion, eight hundred seven million, forty thousand, four hundred eighty-seven".