28279170 has 24 divisors (see below), whose sum is σ = 73526076. Its totient is φ = 7541088.

The previous prime is 28279151. The next prime is 28279171. The reversal of 28279170 is 7197282.

It can be written as a sum of positive squares in 2 ways, for example, as 28164249 + 114921 = 5307^2 + 339^2 .

It is a super-2 number, since 2×28279170² = 1599422911777800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28279171) 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 11 ways as a sum of consecutive naturals, for example, 157017 + ... + 157196.

Almost surely, 2^28279170 is an apocalyptic number.

28279170 is an abundant number, since it is smaller than the sum of its proper divisors (45246906).

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

28279170 is a wasteful number, since it uses less digits than its factorization.

28279170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314226 (or 314223 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 28279170 is about 5317.8162811440. The cubic root of 28279170 is about 304.6647575135.

The spelling of 28279170 in words is "twenty-eight million, two hundred seventy-nine thousand, one hundred seventy".