28700185 has 8 divisors (see below), whose sum is σ = 34477056. Its totient is φ = 22935600.

The previous prime is 28700183. The next prime is 28700209. The reversal of 28700185 is 58100782.

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

It is not a de Polignac number, because 28700185 - 2¹ = 28700183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28700183) 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, 3262 + ... + 8248.

It is an arithmetic number, because the mean of its divisors is an integer number (4309632).

Almost surely, 2^28700185 is an apocalyptic number.

It is an amenable number.

28700185 is a deficient number, since it is larger than the sum of its proper divisors (5776871).

28700185 is a wasteful number, since it uses less digits than its factorization.

28700185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6143.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 28700185 is about 5357.2553607234. The cubic root of 28700185 is about 306.1692465135.

The spelling of 28700185 in words is "twenty-eight million, seven hundred thousand, one hundred eighty-five".