28666170 has 64 divisors (see below), whose sum is σ = 82333440. Its totient is φ = 7055424.

The previous prime is 28666147. The next prime is 28666189. The reversal of 28666170 is 7166682.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 574 + ... + 7593.

It is an arithmetic number, because the mean of its divisors is an integer number (1286460).

Almost surely, 2^28666170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28666170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41166720).

28666170 is an abundant number, since it is smaller than the sum of its proper divisors (53667270).

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

28666170 is a wasteful number, since it uses less digits than its factorization.

28666170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8196 (or 8190 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 28666170 is about 5354.0797528614. The cubic root of 28666170 is about 306.0482430666.

The spelling of 28666170 in words is "twenty-eight million, six hundred sixty-six thousand, one hundred seventy".