28434475899 has 8 divisors (see below), whose sum is σ = 42125149520. Its totient is φ = 18956317248.

The previous prime is 28434475873. The next prime is 28434475943. The reversal of 28434475899 is 99857443482.

28434475899 is a `hidden beast` number, since 2 + 8 + 4 + 3 + 4 + 47 + 589 + 9 = 666.

It is not a de Polignac number, because 28434475899 - 2²¹ = 28432378747 is a prime.

It is a super-3 number, since 3×28434475899³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28434475829) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 526564342 + ... + 526564395.

It is an arithmetic number, because the mean of its divisors is an integer number (5265643690).

Almost surely, 2^28434475899 is an apocalyptic number.

28434475899 is a deficient number, since it is larger than the sum of its proper divisors (13690673621).

28434475899 is a wasteful number, since it uses less digits than its factorization.

28434475899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053128746 (or 1053128740 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The spelling of 28434475899 in words is "twenty-eight billion, four hundred thirty-four million, four hundred seventy-five thousand, eight hundred ninety-nine".