28273899 has 8 divisors (see below), whose sum is σ = 37726672. Its totient is φ = 18835200.

The previous prime is 28273871. The next prime is 28273901. The reversal of 28273899 is 99837282.

It is a happy number.

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

It is not a de Polignac number, because 28273899 - 2¹² = 28269803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28273859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2787 + ... + 8019.

It is an arithmetic number, because the mean of its divisors is an integer number (4715834).

Almost surely, 2^28273899 is an apocalyptic number.

28273899 is a deficient number, since it is larger than the sum of its proper divisors (9452773).

28273899 is a wasteful number, since it uses less digits than its factorization.

28273899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7037.

The product of its digits is 435456, while the sum is 48.

The square root of 28273899 is about 5317.3206598813. The cubic root of 28273899 is about 304.6458273526.

The spelling of 28273899 in words is "twenty-eight million, two hundred seventy-three thousand, eight hundred ninety-nine".