28198790 has 16 divisors (see below), whose sum is σ = 50833440. Its totient is φ = 11262720.

The previous prime is 28198783. The next prime is 28198799. The reversal of 28198790 is 9789182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28198799) 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 7 ways as a sum of consecutive naturals, for example, 6710 + ... + 10070.

It is an arithmetic number, because the mean of its divisors is an integer number (3177090).

Almost surely, 2^28198790 is an apocalyptic number.

28198790 is a deficient number, since it is larger than the sum of its proper divisors (22634650).

28198790 is a wasteful number, since it uses less digits than its factorization.

28198790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4207.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 28198790 is about 5310.2532896275. The cubic root of 28198790 is about 304.3758264478.

The spelling of 28198790 in words is "twenty-eight million, one hundred ninety-eight thousand, seven hundred ninety".