28307230 has 16 divisors (see below), whose sum is σ = 58232160. Its totient is φ = 9705312.

The previous prime is 28307189. The next prime is 28307231. The reversal of 28307230 is 3270382.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28307195 and 28307204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28307231) 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, 202125 + ... + 202264.

It is an arithmetic number, because the mean of its divisors is an integer number (3639510).

Almost surely, 2^28307230 is an apocalyptic number.

28307230 is an abundant number, since it is smaller than the sum of its proper divisors (29924930).

28307230 is a wasteful number, since it uses less digits than its factorization.

28307230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404403.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 28307230 is about 5320.4539280028. The cubic root of 28307230 is about 304.7654920484.

The spelling of 28307230 in words is "twenty-eight million, three hundred seven thousand, two hundred thirty".