28198542 has 8 divisors (see below), whose sum is σ = 56397096. Its totient is φ = 9399512.

The previous prime is 28198537. The next prime is 28198549. The reversal of 28198542 is 24589182.

It is a sphenic number, since it is the product of 3 distinct primes.

28198542 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 28198542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28198549) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2349873 + ... + 2349884.

It is an arithmetic number, because the mean of its divisors is an integer number (7049637).

Almost surely, 2^28198542 is an apocalyptic number.

28198542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28198542 is a wasteful number, since it uses less digits than its factorization.

28198542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4699762.

The product of its digits is 46080, while the sum is 39.

The square root of 28198542 is about 5310.2299385243. The cubic root of 28198542 is about 304.3749341468.

The spelling of 28198542 in words is "twenty-eight million, one hundred ninety-eight thousand, five hundred forty-two".