28190022337 has 4 divisors (see below), whose sum is σ = 28190365060. Its totient is φ = 28189679616.

The previous prime is 28190022313. The next prime is 28190022349. The reversal of 28190022337 is 73322009182.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3412429056 + 24777593281 = 58416^2 + 157409^2 .

It is a 3-Lehmer number, since φ(28190022337) divides (28190022337-1)³.

It is a cyclic number.

It is not a de Polignac number, because 28190022337 - 2⁷ = 28190022209 is a prime.

It is a deceptive number, since it divides R_28190022336.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28190022296 and 28190022305.

It is not an unprimeable number, because it can be changed into a prime (28190022397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34273 + ... + 239905.

It is an arithmetic number, because the mean of its divisors is an integer number (7047591265).

Almost surely, 2^28190022337 is an apocalyptic number.

28190022337 is the 137089-th pentagonal number.

It is an amenable number.

28190022337 is a deficient number, since it is larger than the sum of its proper divisors (342723).

28190022337 is a wasteful number, since it uses less digits than its factorization.

28190022337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342722.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 28190022337 in words is "twenty-eight billion, one hundred ninety million, twenty-two thousand, three hundred thirty-seven".