28549542 has 16 divisors (see below), whose sum is σ = 65256192. Its totient is φ = 8157000.

The previous prime is 28549537. The next prime is 28549553. The reversal of 28549542 is 24594582.

It is a self number, because there is not a number n which added to its sum of digits gives 28549542.

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 in 7 ways as a sum of consecutive naturals, for example, 339834 + ... + 339917.

It is an arithmetic number, because the mean of its divisors is an integer number (4078512).

Almost surely, 2^28549542 is an apocalyptic number.

28549542 is an abundant number, since it is smaller than the sum of its proper divisors (36706650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28549542 is a wasteful number, since it uses less digits than its factorization.

28549542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679763.

The product of its digits is 115200, while the sum is 39.

The square root of 28549542 is about 5343.1771447333. The cubic root of 28549542 is about 305.6326276006.

The spelling of 28549542 in words is "twenty-eight million, five hundred forty-nine thousand, five hundred forty-two".