28920577199 has 4 divisors (see below), whose sum is σ = 28937383440. Its totient is φ = 28903770960.

The previous prime is 28920577193. The next prime is 28920577211. The reversal of 28920577199 is 99177502982.

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

It is a cyclic number.

It is not a de Polignac number, because 28920577199 - 2²⁴ = 28903799983 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 (28920577193) 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, 8400539 + ... + 8403980.

It is an arithmetic number, because the mean of its divisors is an integer number (7234345860).

Almost surely, 2^28920577199 is an apocalyptic number.

28920577199 is a deficient number, since it is larger than the sum of its proper divisors (16806241).

28920577199 is a wasteful number, since it uses less digits than its factorization.

28920577199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16806240.

The product of its (nonzero) digits is 5715360, while the sum is 59.

The spelling of 28920577199 in words is "twenty-eight billion, nine hundred twenty million, five hundred seventy-seven thousand, one hundred ninety-nine".