28122499 has 8 divisors (see below), whose sum is σ = 28712960. Its totient is φ = 27538056.

The previous prime is 28122469. The next prime is 28122509. The reversal of 28122499 is 99422182.

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

It is a cyclic number.

It is not a de Polignac number, because 28122499 - 2⁵ = 28122467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28122439) 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 7 ways as a sum of consecutive naturals, for example, 8632 + ... + 11434.

It is an arithmetic number, because the mean of its divisors is an integer number (3589120).

Almost surely, 2^28122499 is an apocalyptic number.

28122499 is a deficient number, since it is larger than the sum of its proper divisors (590461).

28122499 is a wasteful number, since it uses less digits than its factorization.

28122499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3009.

The product of its digits is 20736, while the sum is 37.

The square root of 28122499 is about 5303.0650571156. The cubic root of 28122499 is about 304.1010852376.

The spelling of 28122499 in words is "twenty-eight million, one hundred twenty-two thousand, four hundred ninety-nine".