28474539 has 4 divisors (see below), whose sum is σ = 37966056. Its totient is φ = 18983024.

The previous prime is 28474517. The next prime is 28474583. The reversal of 28474539 is 93547482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28474539 - 2⁸ = 28474283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28474539.

It is not an unprimeable number, because it can be changed into a prime (28473539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4745754 + ... + 4745759.

It is an arithmetic number, because the mean of its divisors is an integer number (9491514).

Almost surely, 2^28474539 is an apocalyptic number.

28474539 is a deficient number, since it is larger than the sum of its proper divisors (9491517).

28474539 is an equidigital number, since it uses as much as digits as its factorization.

28474539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9491516.

The product of its digits is 241920, while the sum is 42.

The square root of 28474539 is about 5336.1539520520. The cubic root of 28474539 is about 305.3647486104.

The spelling of 28474539 in words is "twenty-eight million, four hundred seventy-four thousand, five hundred thirty-nine".