28198434 has 16 divisors (see below), whose sum is σ = 61524000. Its totient is φ = 8544960.

The previous prime is 28198421. The next prime is 28198453. The reversal of 28198434 is 43489182.

It is a junction number, because it is equal to n+sod(n) for n = 28198392 and 28198401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213559 + ... + 213690.

It is an arithmetic number, because the mean of its divisors is an integer number (3845250).

Almost surely, 2^28198434 is an apocalyptic number.

28198434 is an abundant number, since it is smaller than the sum of its proper divisors (33325566).

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

28198434 is a wasteful number, since it uses less digits than its factorization.

28198434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427265.

The product of its digits is 55296, while the sum is 39.

The square root of 28198434 is about 5310.2197694634. The cubic root of 28198434 is about 304.3745455625.

The spelling of 28198434 in words is "twenty-eight million, one hundred ninety-eight thousand, four hundred thirty-four".