28750686 has 32 divisors (see below), whose sum is σ = 61119360. Its totient is φ = 8990496.

The previous prime is 28750679. The next prime is 28750727. The reversal of 28750686 is 68605782.

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, 11020 + ... + 13376.

It is an arithmetic number, because the mean of its divisors is an integer number (1909980).

Almost surely, 2^28750686 is an apocalyptic number.

28750686 is an abundant number, since it is smaller than the sum of its proper divisors (32368674).

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

28750686 is a wasteful number, since it uses less digits than its factorization.

28750686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 28750686 is about 5361.9666168301. The cubic root of 28750686 is about 306.3487203049.

The spelling of 28750686 in words is "twenty-eight million, seven hundred fifty thousand, six hundred eighty-six".