28640170 has 32 divisors (see below), whose sum is σ = 55923840. Its totient is φ = 10497600.

The previous prime is 28640167. The next prime is 28640177. The reversal of 28640170 is 7104682.

It is not an unprimeable number, because it can be changed into a prime (28640177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18901 + ... + 20359.

It is an arithmetic number, because the mean of its divisors is an integer number (1747620).

Almost surely, 2^28640170 is an apocalyptic number.

28640170 is a deficient number, since it is larger than the sum of its proper divisors (27283670).

28640170 is a wasteful number, since it uses less digits than its factorization.

28640170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 28640170 is about 5351.6511470760. The cubic root of 28640170 is about 305.9556872623.

The spelling of 28640170 in words is "twenty-eight million, six hundred forty thousand, one hundred seventy".