28234587 has 4 divisors (see below), whose sum is σ = 37646120. Its totient is φ = 18823056.

The previous prime is 28234573. The next prime is 28234601. The reversal of 28234587 is 78543282.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (28234573) and next prime (28234601).

It is not a de Polignac number, because 28234587 - 2⁴ = 28234571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28234517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4705762 + ... + 4705767.

It is an arithmetic number, because the mean of its divisors is an integer number (9411530).

Almost surely, 2^28234587 is an apocalyptic number.

28234587 is a deficient number, since it is larger than the sum of its proper divisors (9411533).

28234587 is an equidigital number, since it uses as much as digits as its factorization.

28234587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9411532.

The product of its digits is 107520, while the sum is 39.

The square root of 28234587 is about 5313.6227754706. The cubic root of 28234587 is about 304.5045687824.

The spelling of 28234587 in words is "twenty-eight million, two hundred thirty-four thousand, five hundred eighty-seven".