28233427 has 4 divisors (see below), whose sum is σ = 28396800. Its totient is φ = 28070056.

The previous prime is 28233421. The next prime is 28233437. The reversal of 28233427 is 72433282.

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

It is a cyclic number.

It is not a de Polignac number, because 28233427 - 2⁷ = 28233299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28233421) 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, 81427 + ... + 81772.

It is an arithmetic number, because the mean of its divisors is an integer number (7099200).

Almost surely, 2^28233427 is an apocalyptic number.

28233427 is a deficient number, since it is larger than the sum of its proper divisors (163373).

28233427 is a wasteful number, since it uses less digits than its factorization.

28233427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163372.

The product of its digits is 16128, while the sum is 31.

The square root of 28233427 is about 5313.5136209480. The cubic root of 28233427 is about 304.5003985999.

The spelling of 28233427 in words is "twenty-eight million, two hundred thirty-three thousand, four hundred twenty-seven".