28585398 has 16 divisors (see below), whose sum is σ = 60534000. Its totient is φ = 8967936.

The previous prime is 28585331. The next prime is 28585399. The reversal of 28585398 is 89358582.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28585399) 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, 140023 + ... + 140226.

It is an arithmetic number, because the mean of its divisors is an integer number (3783375).

Almost surely, 2^28585398 is an apocalyptic number.

28585398 is an abundant number, since it is smaller than the sum of its proper divisors (31948602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28585398 is a wasteful number, since it uses less digits than its factorization.

28585398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280271.

The product of its digits is 691200, while the sum is 48.

The square root of 28585398 is about 5346.5313989539. The cubic root of 28585398 is about 305.7605243273.

It can be divided in two parts, 2858 and 5398, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 28585398 in words is "twenty-eight million, five hundred eighty-five thousand, three hundred ninety-eight".