28099915877 has 8 divisors (see below), whose sum is σ = 30701840832. Its totient is φ = 25505888800.

The previous prime is 28099915861. The next prime is 28099915901. The reversal of 28099915877 is 77851999082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28099915877 - 2⁴ = 28099915861 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 (28099918877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1967024 + ... + 1981257.

It is an arithmetic number, because the mean of its divisors is an integer number (3837730104).

Almost surely, 2^28099915877 is an apocalyptic number.

It is an amenable number.

28099915877 is a deficient number, since it is larger than the sum of its proper divisors (2601924955).

28099915877 is a wasteful number, since it uses less digits than its factorization.

28099915877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948939.

The product of its (nonzero) digits is 22861440, while the sum is 65.

The spelling of 28099915877 in words is "twenty-eight billion, ninety-nine million, nine hundred fifteen thousand, eight hundred seventy-seven".