28009670 has 16 divisors (see below), whose sum is σ = 54295920. Its totient is φ = 10341984.

The previous prime is 28009669. The next prime is 28009721. The reversal of 28009670 is 7690082.

It is a super-2 number, since 2×28009670² = 1569083227017800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 107600 + ... + 107859.

It is an arithmetic number, because the mean of its divisors is an integer number (3393495).

Almost surely, 2^28009670 is an apocalyptic number.

28009670 is a deficient number, since it is larger than the sum of its proper divisors (26286250).

28009670 is a wasteful number, since it uses less digits than its factorization.

28009670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215479.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 28009670 is about 5292.4162723656. The cubic root of 28009670 is about 303.6938500872.

The spelling of 28009670 in words is "twenty-eight million, nine thousand, six hundred seventy".