28550706 has 16 divisors (see below), whose sum is σ = 57210624. Its totient is φ = 9498704.

The previous prime is 28550699. The next prime is 28550707. The reversal of 28550706 is 60705582.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28550707) 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 7 ways as a sum of consecutive naturals, for example, 930 + ... + 7613.

It is an arithmetic number, because the mean of its divisors is an integer number (3575664).

Almost surely, 2^28550706 is an apocalyptic number.

28550706 is an abundant number, since it is smaller than the sum of its proper divisors (28659918).

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

28550706 is a wasteful number, since it uses less digits than its factorization.

28550706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9105.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 28550706 is about 5343.2860675805. The cubic root of 28550706 is about 305.6367812171.

The spelling of 28550706 in words is "twenty-eight million, five hundred fifty thousand, seven hundred six".