28230387 has 12 divisors (see below), whose sum is σ = 39986136. Its totient is φ = 17712640.

The previous prime is 28230359. The next prime is 28230443. The reversal of 28230387 is 78303282.

It is a happy number.

It is not a de Polignac number, because 28230387 - 2⁷ = 28230259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28230287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15414 + ... + 17147.

It is an arithmetic number, because the mean of its divisors is an integer number (3332178).

Almost surely, 2^28230387 is an apocalyptic number.

28230387 is a deficient number, since it is larger than the sum of its proper divisors (11755749).

28230387 is a wasteful number, since it uses less digits than its factorization.

28230387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32598 (or 32581 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28230387 is about 5313.2275501808. The cubic root of 28230387 is about 304.4894693040.

The spelling of 28230387 in words is "twenty-eight million, two hundred thirty thousand, three hundred eighty-seven".