28844157 has 8 divisors (see below), whose sum is σ = 38484160. Its totient is φ = 19216800.

The previous prime is 28844143. The next prime is 28844159. The reversal of 28844157 is 75144882.

It is a happy number.

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

It is not a de Polignac number, because 28844157 - 2⁴ = 28844141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28844159) 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, 5769 + ... + 9537.

It is an arithmetic number, because the mean of its divisors is an integer number (4810520).

Almost surely, 2^28844157 is an apocalyptic number.

It is an amenable number.

28844157 is a deficient number, since it is larger than the sum of its proper divisors (9640003).

28844157 is a wasteful number, since it uses less digits than its factorization.

28844157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6323.

The product of its digits is 71680, while the sum is 39.

The square root of 28844157 is about 5370.6756558184. The cubic root of 28844157 is about 306.6803500248.

The spelling of 28844157 in words is "twenty-eight million, eight hundred forty-four thousand, one hundred fifty-seven".