28420983815 has 16 divisors (see below), whose sum is σ = 38984079168. Its totient is φ = 19485309696.

The previous prime is 28420983733. The next prime is 28420983817. The reversal of 28420983815 is 51838902482.

It is a cyclic number.

It is not a de Polignac number, because 28420983815 - 2²⁶ = 28353874951 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 (28420983817) 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, 144779 + ... + 278931.

It is an arithmetic number, because the mean of its divisors is an integer number (2436504948).

Almost surely, 2^28420983815 is an apocalyptic number.

28420983815 is a deficient number, since it is larger than the sum of its proper divisors (10563095353).

28420983815 is a wasteful number, since it uses less digits than its factorization.

28420983815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140218.

The product of its (nonzero) digits is 1105920, while the sum is 50.

The spelling of 28420983815 in words is "twenty-eight billion, four hundred twenty million, nine hundred eighty-three thousand, eight hundred fifteen".