28645539 has 16 divisors (see below), whose sum is σ = 41809824. Its totient is φ = 17337600.

The previous prime is 28645531. The next prime is 28645567. The reversal of 28645539 is 93554682.

It is not a de Polignac number, because 28645539 - 2³ = 28645531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28645539.

It is not an unprimeable number, because it can be changed into a prime (28645531) 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, 3642 + ... + 8399.

It is an arithmetic number, because the mean of its divisors is an integer number (2613114).

Almost surely, 2^28645539 is an apocalyptic number.

28645539 is a deficient number, since it is larger than the sum of its proper divisors (13164285).

28645539 is a wasteful number, since it uses less digits than its factorization.

28645539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12118.

The product of its digits is 259200, while the sum is 42.

The square root of 28645539 is about 5352.1527444571. The cubic root of 28645539 is about 305.9748046238.

The spelling of 28645539 in words is "twenty-eight million, six hundred forty-five thousand, five hundred thirty-nine".