28798459 has 4 divisors (see below), whose sum is σ = 30492504. Its totient is φ = 27104416.

The previous prime is 28798457. The next prime is 28798463. The reversal of 28798459 is 95489782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28798459 - 2¹ = 28798457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28798457) 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 3 ways as a sum of consecutive naturals, for example, 846997 + ... + 847030.

It is an arithmetic number, because the mean of its divisors is an integer number (7623126).

Almost surely, 2^28798459 is an apocalyptic number.

28798459 is a deficient number, since it is larger than the sum of its proper divisors (1694045).

28798459 is a wasteful number, since it uses less digits than its factorization.

28798459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694044.

The product of its digits is 1451520, while the sum is 52.

The square root of 28798459 is about 5366.4195698808. The cubic root of 28798459 is about 306.5183058097.

The spelling of 28798459 in words is "twenty-eight million, seven hundred ninety-eight thousand, four hundred fifty-nine".