28861205 has 8 divisors (see below), whose sum is σ = 36139392. Its totient is φ = 22085008.

The previous prime is 28861201. The next prime is 28861211. The reversal of 28861205 is 50216882.

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 28861205 - 2² = 28861201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28861201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125369 + ... + 125598.

It is an arithmetic number, because the mean of its divisors is an integer number (4517424).

Almost surely, 2^28861205 is an apocalyptic number.

It is an amenable number.

28861205 is a deficient number, since it is larger than the sum of its proper divisors (7278187).

28861205 is a wasteful number, since it uses less digits than its factorization.

28861205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250995.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 28861205 is about 5372.2625587363. The cubic root of 28861205 is about 306.7407580641.

The spelling of 28861205 in words is "twenty-eight million, eight hundred sixty-one thousand, two hundred five".