28459999 has 8 divisors (see below), whose sum is σ = 29010960. Its totient is φ = 27913536.

The previous prime is 28459979. The next prime is 28460011. The reversal of 28459999 is 99995482.

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 28459999 - 2¹³ = 28451807 is a prime.

It is a Duffinian number.

28459999 is a modest number, since divided by 9999 gives 2845 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28459909) 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, 13392 + ... + 15370.

It is an arithmetic number, because the mean of its divisors is an integer number (3626370).

Almost surely, 2^28459999 is an apocalyptic number.

28459999 is a deficient number, since it is larger than the sum of its proper divisors (550961).

28459999 is a wasteful number, since it uses less digits than its factorization.

28459999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2249.

The product of its digits is 2099520, while the sum is 55.

The square root of 28459999 is about 5334.7913736153. The cubic root of 28459999 is about 305.3127634622.

The spelling of 28459999 in words is "twenty-eight million, four hundred fifty-nine thousand, nine hundred ninety-nine".