28986829811 has 4 divisors (see below), whose sum is σ = 29146978224. Its totient is φ = 28826681400.

The previous prime is 28986829789. The next prime is 28986829849. The reversal of 28986829811 is 11892868982.

It is a happy number.

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 28986829811 - 2¹⁸ = 28986567667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28986829211) 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, 80073935 + ... + 80074296.

It is an arithmetic number, because the mean of its divisors is an integer number (7286744556).

Almost surely, 2^28986829811 is an apocalyptic number.

28986829811 is a deficient number, since it is larger than the sum of its proper divisors (160148413).

28986829811 is a wasteful number, since it uses less digits than its factorization.

28986829811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160148412.

The product of its digits is 7962624, while the sum is 62.

The spelling of 28986829811 in words is "twenty-eight billion, nine hundred eighty-six million, eight hundred twenty-nine thousand, eight hundred eleven".