28431844619 has 4 divisors (see below), whose sum is σ = 28549819320. Its totient is φ = 28313869920.

The previous prime is 28431844607. The next prime is 28431844687. The reversal of 28431844619 is 91644813482.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28431844619 is a prime.

It is a super-2 number, since 2×28431844619² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28431844319) 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, 58986989 + ... + 58987470.

It is an arithmetic number, because the mean of its divisors is an integer number (7137454830).

Almost surely, 2^28431844619 is an apocalyptic number.

28431844619 is a deficient number, since it is larger than the sum of its proper divisors (117974701).

28431844619 is a wasteful number, since it uses less digits than its factorization.

28431844619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117974700.

The product of its digits is 1327104, while the sum is 50.

The spelling of 28431844619 in words is "twenty-eight billion, four hundred thirty-one million, eight hundred forty-four thousand, six hundred nineteen".