28012299 has 8 divisors (see below), whose sum is σ = 42685440. Its totient is φ = 16007016.

The previous prime is 28012297. The next prime is 28012301. The reversal of 28012299 is 99221082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28012297) and next prime (28012301).

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

It is not a de Polignac number, because 28012299 - 2¹ = 28012297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28012291) 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, 666939 + ... + 666980.

It is an arithmetic number, because the mean of its divisors is an integer number (5335680).

Almost surely, 2^28012299 is an apocalyptic number.

28012299 is a deficient number, since it is larger than the sum of its proper divisors (14673141).

28012299 is a wasteful number, since it uses less digits than its factorization.

28012299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333929.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 28012299 is about 5292.6646408024. The cubic root of 28012299 is about 303.7033514029.

The spelling of 28012299 in words is "twenty-eight million, twelve thousand, two hundred ninety-nine".