28589706 has 32 divisors (see below), whose sum is σ = 63720000. Its totient is φ = 9501840.

The previous prime is 28589681. The next prime is 28589741. The reversal of 28589706 is 60798582.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 26416 + ... + 27476.

It is an arithmetic number, because the mean of its divisors is an integer number (1991250).

Almost surely, 2^28589706 is an apocalyptic number.

28589706 is an abundant number, since it is smaller than the sum of its proper divisors (35130294).

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

28589706 is a wasteful number, since it uses less digits than its factorization.

28589706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571 (or 1565 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 28589706 is about 5346.9342617990. The cubic root of 28589706 is about 305.7758835697.

The spelling of 28589706 in words is "twenty-eight million, five hundred eighty-nine thousand, seven hundred six".