28386670 has 32 divisors (see below), whose sum is σ = 55974240. Its totient is φ = 10300800.

The previous prime is 28386649. The next prime is 28386671. The reversal of 28386670 is 7668382.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28386671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5820 + ... + 9520.

It is an arithmetic number, because the mean of its divisors is an integer number (1749195).

Almost surely, 2^28386670 is an apocalyptic number.

28386670 is a deficient number, since it is larger than the sum of its proper divisors (27587570).

28386670 is a wasteful number, since it uses less digits than its factorization.

28386670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 28386670 is about 5327.9142260363. The cubic root of 28386670 is about 305.0503186710.

The spelling of 28386670 in words is "twenty-eight million, three hundred eighty-six thousand, six hundred seventy".