28537449 has 16 divisors (see below), whose sum is σ = 40457280. Its totient is φ = 17841600.

The previous prime is 28537427. The next prime is 28537459. The reversal of 28537449 is 94473582.

It is not a de Polignac number, because 28537449 - 2⁵ = 28537417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28537449.

It is not an unprimeable number, because it can be changed into a prime (28537459) 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, 3279 + ... + 8235.

It is an arithmetic number, because the mean of its divisors is an integer number (2528580).

Almost surely, 2^28537449 is an apocalyptic number.

It is an amenable number.

28537449 is a deficient number, since it is larger than the sum of its proper divisors (11919831).

28537449 is a wasteful number, since it uses less digits than its factorization.

28537449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080.

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

The square root of 28537449 is about 5342.0453947903. The cubic root of 28537449 is about 305.5894682703.

The spelling of 28537449 in words is "twenty-eight million, five hundred thirty-seven thousand, four hundred forty-nine".