28179899 has 16 divisors (see below), whose sum is σ = 33122304. Its totient is φ = 23707200.

The previous prime is 28179883. The next prime is 28179901. The reversal of 28179899 is 99897182.

It is not a de Polignac number, because 28179899 - 2⁴ = 28179883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28179899.

It is not an unprimeable number, because it can be changed into a prime (28179859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6047 + ... + 9639.

It is an arithmetic number, because the mean of its divisors is an integer number (2070144).

Almost surely, 2^28179899 is an apocalyptic number.

28179899 is a deficient number, since it is larger than the sum of its proper divisors (4942405).

28179899 is a wasteful number, since it uses less digits than its factorization.

28179899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658.

The product of its digits is 653184, while the sum is 53.

The square root of 28179899 is about 5308.4742629121. The cubic root of 28179899 is about 304.3078418732.

The spelling of 28179899 in words is "twenty-eight million, one hundred seventy-nine thousand, eight hundred ninety-nine".