28190409999 has 8 divisors (see below), whose sum is σ = 37588108800. Its totient is φ = 18793158936.

The previous prime is 28190409971. The next prime is 28190410019. The reversal of 28190409999 is 99990409182.

It is a happy number.

It is a Cunningham number, because it is equal to 167900²-1.

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

It is not a de Polignac number, because 28190409999 - 2⁹ = 28190409487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28190409199) 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, 83952 + ... + 251850.

It is an arithmetic number, because the mean of its divisors is an integer number (4698513600).

Almost surely, 2^28190409999 is an apocalyptic number.

28190409999 is a deficient number, since it is larger than the sum of its proper divisors (9397698801).

28190409999 is a wasteful number, since it uses less digits than its factorization.

28190409999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223869.

The product of its (nonzero) digits is 3779136, while the sum is 60.

The spelling of 28190409999 in words is "twenty-eight billion, one hundred ninety million, four hundred nine thousand, nine hundred ninety-nine".