28198426 has 8 divisors (see below), whose sum is σ = 42360084. Its totient is φ = 14078400.

The previous prime is 28198421. The next prime is 28198453. The reversal of 28198426 is 62489182.

It can be written as a sum of positive squares in 2 ways, for example, as 28079401 + 119025 = 5299^2 + 345^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28198421) 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, 8655 + ... + 11458.

Almost surely, 2^28198426 is an apocalyptic number.

28198426 is a deficient number, since it is larger than the sum of its proper divisors (14161658).

28198426 is a wasteful number, since it uses less digits than its factorization.

28198426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20816.

The product of its digits is 55296, while the sum is 40.

The square root of 28198426 is about 5310.2190161989. The cubic root of 28198426 is about 304.3745167784.

The spelling of 28198426 in words is "twenty-eight million, one hundred ninety-eight thousand, four hundred twenty-six".