28346670 has 144 divisors (see below), whose sum is σ = 85896720. Its totient is φ = 6462720.

The previous prime is 28346663. The next prime is 28346707. The reversal of 28346670 is 7664382.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 206842 + ... + 206978.

It is an arithmetic number, because the mean of its divisors is an integer number (596505).

Almost surely, 2^28346670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28346670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42948360).

28346670 is an abundant number, since it is smaller than the sum of its proper divisors (57550050).

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

28346670 is a wasteful number, since it uses less digits than its factorization.

28346670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 28346670 is about 5324.1590885322. The cubic root of 28346670 is about 304.9069679531.

The spelling of 28346670 in words is "twenty-eight million, three hundred forty-six thousand, six hundred seventy".