28197160 has 16 divisors (see below), whose sum is σ = 63443700. Its totient is φ = 11278848.

The previous prime is 28197157. The next prime is 28197167. The reversal of 28197160 is 6179182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27060804 + 1136356 = 5202^2 + 1066^2 .

It is not an unprimeable number, because it can be changed into a prime (28197167) 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, 352425 + ... + 352504.

Almost surely, 2^28197160 is an apocalyptic number.

28197160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28197160 is an abundant number, since it is smaller than the sum of its proper divisors (35246540).

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

28197160 is a wasteful number, since it uses less digits than its factorization.

28197160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704940 (or 704936 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 28197160 is about 5310.0998107380. The cubic root of 28197160 is about 304.3699616317.

The spelling of 28197160 in words is "twenty-eight million, one hundred ninety-seven thousand, one hundred sixty".