28209459 has 16 divisors (see below), whose sum is σ = 38328192. Its totient is φ = 18451968.

The previous prime is 28209451. The next prime is 28209487. The reversal of 28209459 is 95490282.

It is not a de Polignac number, because 28209459 - 2³ = 28209451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28209451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47764 + ... + 48350.

It is an arithmetic number, because the mean of its divisors is an integer number (2395512).

Almost surely, 2^28209459 is an apocalyptic number.

28209459 is a deficient number, since it is larger than the sum of its proper divisors (10118733).

28209459 is a wasteful number, since it uses less digits than its factorization.

28209459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 28209459 is about 5311.2577606439. The cubic root of 28209459 is about 304.4142084284.

The spelling of 28209459 in words is "twenty-eight million, two hundred nine thousand, four hundred fifty-nine".