28775666371 has 8 divisors (see below), whose sum is σ = 28819720944. Its totient is φ = 28731645600.

The previous prime is 28775666357. The next prime is 28775666407. The reversal of 28775666371 is 17366657782.

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 28775666371 - 2¹⁵ = 28775633603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28775666071) 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, 2066685 + ... + 2080561.

It is an arithmetic number, because the mean of its divisors is an integer number (3602465118).

Almost surely, 2^28775666371 is an apocalyptic number.

28775666371 is a deficient number, since it is larger than the sum of its proper divisors (44054573).

28775666371 is a wasteful number, since it uses less digits than its factorization.

28775666371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16901.

The product of its digits is 17781120, while the sum is 58.

The spelling of 28775666371 in words is "twenty-eight billion, seven hundred seventy-five million, six hundred sixty-six thousand, three hundred seventy-one".