28539488 has 12 divisors (see below), whose sum is σ = 56187180. Its totient is φ = 14269728.

The previous prime is 28539479. The next prime is 28539503. The reversal of 28539488 is 88493582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445898 + ... + 445961.

It is an arithmetic number, because the mean of its divisors is an integer number (4682265).

Almost surely, 2^28539488 is an apocalyptic number.

It is an amenable number.

28539488 is a deficient number, since it is larger than the sum of its proper divisors (27647692).

28539488 is an equidigital number, since it uses as much as digits as its factorization.

28539488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891869 (or 891861 counting only the distinct ones).

The product of its digits is 552960, while the sum is 47.

The square root of 28539488 is about 5342.2362358847. The cubic root of 28539488 is about 305.5967462168.

The spelling of 28539488 in words is "twenty-eight million, five hundred thirty-nine thousand, four hundred eighty-eight".