28209555399 has 8 divisors (see below), whose sum is σ = 37759094640. Its totient is φ = 18733193216.

The previous prime is 28209555397. The next prime is 28209555401. The reversal of 28209555399 is 99355590282.

It is an interprime number because it is at equal distance from previous prime (28209555397) and next prime (28209555401).

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 28209555399 - 2¹ = 28209555397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28209555397) 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, 18293364 + ... + 18294905.

It is an arithmetic number, because the mean of its divisors is an integer number (4719886830).

Almost surely, 2^28209555399 is an apocalyptic number.

28209555399 is a deficient number, since it is larger than the sum of its proper divisors (9549539241).

28209555399 is a wasteful number, since it uses less digits than its factorization.

28209555399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36588529.

The product of its (nonzero) digits is 8748000, while the sum is 57.

The spelling of 28209555399 in words is "twenty-eight billion, two hundred nine million, five hundred fifty-five thousand, three hundred ninety-nine".