28941806 has 8 divisors (see below), whose sum is σ = 43586424. Its totient is φ = 14413000.

The previous prime is 28941779. The next prime is 28941823. The reversal of 28941806 is 60814982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28941806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28325 + ... + 29328.

It is an arithmetic number, because the mean of its divisors is an integer number (5448303).

Almost surely, 2^28941806 is an apocalyptic number.

28941806 is a deficient number, since it is larger than the sum of its proper divisors (14644618).

28941806 is a wasteful number, since it uses less digits than its factorization.

28941806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57906.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 28941806 is about 5379.7589165315. The cubic root of 28941806 is about 307.0260387397.

The spelling of 28941806 in words is "twenty-eight million, nine hundred forty-one thousand, eight hundred six".