28197170 has 8 divisors (see below), whose sum is σ = 50754924. Its totient is φ = 11278864.

The previous prime is 28197167. The next prime is 28197173. The reversal of 28197170 is 7179182.

It is an interprime number because it is at equal distance from previous prime (28197167) and next prime (28197173).

It can be written as a sum of positive squares in 2 ways, for example, as 25633969 + 2563201 = 5063^2 + 1601^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 28197170.

It is not an unprimeable number, because it can be changed into a prime (28197173) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1409849 + ... + 1409868.

Almost surely, 2^28197170 is an apocalyptic number.

28197170 is a deficient number, since it is larger than the sum of its proper divisors (22557754).

28197170 is a wasteful number, since it uses less digits than its factorization.

28197170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819724.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 28197170 is about 5310.1007523398. The cubic root of 28197170 is about 304.3699976128.

The spelling of 28197170 in words is "twenty-eight million, one hundred ninety-seven thousand, one hundred seventy".