28947205 has 8 divisors (see below), whose sum is σ = 39699072. Its totient is φ = 19849488.

The previous prime is 28947181. The next prime is 28947251. The reversal of 28947205 is 50274982.

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

It is a cyclic number.

It is not a de Polignac number, because 28947205 - 2¹⁵ = 28914437 is a prime.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 413497 + ... + 413566.

It is an arithmetic number, because the mean of its divisors is an integer number (4962384).

Almost surely, 2^28947205 is an apocalyptic number.

It is an amenable number.

28947205 is a deficient number, since it is larger than the sum of its proper divisors (10751867).

28947205 is an equidigital number, since it uses as much as digits as its factorization.

28947205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827075.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 28947205 is about 5380.2606814168. The cubic root of 28947205 is about 307.0451291231.

The spelling of 28947205 in words is "twenty-eight million, nine hundred forty-seven thousand, two hundred five".