28198935 has 24 divisors (see below), whose sum is σ = 50690640. Its totient is φ = 15038784.

The previous prime is 28198931. The next prime is 28198949. The reversal of 28198935 is 53989182.

It is a happy number.

It is not a de Polignac number, because 28198935 - 2² = 28198931 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28198931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10390 + ... + 12819.

It is an arithmetic number, because the mean of its divisors is an integer number (2112110).

Almost surely, 2^28198935 is an apocalyptic number.

28198935 is a deficient number, since it is larger than the sum of its proper divisors (22491705).

28198935 is an equidigital number, since it uses as much as digits as its factorization.

28198935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23229 (or 23217 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 28198935 is about 5310.2669424427. The cubic root of 28198935 is about 304.3763481536.

The spelling of 28198935 in words is "twenty-eight million, one hundred ninety-eight thousand, nine hundred thirty-five".