28170270 has 24 divisors (see below), whose sum is σ = 73242936. Its totient is φ = 7512048.

The previous prime is 28170269. The next prime is 28170277. The reversal of 28170270 is 7207182.

It is a super-2 number, since 2×28170270² = 1587128223745800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28170277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156412 + ... + 156591.

It is an arithmetic number, because the mean of its divisors is an integer number (3051789).

Almost surely, 2^28170270 is an apocalyptic number.

28170270 is an abundant number, since it is smaller than the sum of its proper divisors (45072666).

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

28170270 is a wasteful number, since it uses less digits than its factorization.

28170270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313016 (or 313013 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 28170270 is about 5307.5672393291. The cubic root of 28170270 is about 304.2731775188.

The spelling of 28170270 in words is "twenty-eight million, one hundred seventy thousand, two hundred seventy".