28198170 has 192 divisors, whose sum is σ = 98751744. Its totient is φ = 5391360.

The previous prime is 28198141. The next prime is 28198187. The reversal of 28198170 is 7189182.

28198170 = 990² + 991² + ... + 1017².

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 89934 + ... + 90246.

It is an arithmetic number, because the mean of its divisors is an integer number (514332).

Almost surely, 2^28198170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28198170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49375872).

28198170 is an abundant number, since it is smaller than the sum of its proper divisors (70553574).

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

28198170 is a wasteful number, since it uses less digits than its factorization.

28198170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 28198170 is about 5310.1949116770. The cubic root of 28198170 is about 304.3735956855.

The spelling of 28198170 in words is "twenty-eight million, one hundred ninety-eight thousand, one hundred seventy".