28535870 has 32 divisors (see below), whose sum is σ = 58475520. Its totient is φ = 9924640.

The previous prime is 28535863. The next prime is 28535933. The reversal of 28535870 is 7853582.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3110 + ... + 8169.

It is an arithmetic number, because the mean of its divisors is an integer number (1827360).

Almost surely, 2^28535870 is an apocalyptic number.

28535870 is an abundant number, since it is smaller than the sum of its proper divisors (29939650).

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

28535870 is a wasteful number, since it uses less digits than its factorization.

28535870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11320.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 28535870 is about 5341.8976029123. The cubic root of 28535870 is about 305.5838319960.

The spelling of 28535870 in words is "twenty-eight million, five hundred thirty-five thousand, eight hundred seventy".