28397583 has 12 divisors (see below), whose sum is σ = 42433560. Its totient is φ = 18278736.

The previous prime is 28397573. The next prime is 28397597. The reversal of 28397583 is 38579382.

It is not a de Polignac number, because 28397583 - 2¹³ = 28389391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28397573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54141 + ... + 54662.

It is an arithmetic number, because the mean of its divisors is an integer number (3536130).

Almost surely, 2^28397583 is an apocalyptic number.

28397583 is a deficient number, since it is larger than the sum of its proper divisors (14035977).

28397583 is a wasteful number, since it uses less digits than its factorization.

28397583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108838 (or 108835 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 28397583 is about 5328.9382619805. The cubic root of 28397583 is about 305.0894049466.

The spelling of 28397583 in words is "twenty-eight million, three hundred ninety-seven thousand, five hundred eighty-three".