28874445 has 8 divisors (see below), whose sum is σ = 46199136. Its totient is φ = 15399696.

The previous prime is 28874441. The next prime is 28874477. The reversal of 28874445 is 54447882.

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

It is not a de Polignac number, because 28874445 - 2² = 28874441 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 28874397 and 28874406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28874441) 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, 962467 + ... + 962496.

It is an arithmetic number, because the mean of its divisors is an integer number (5774892).

Almost surely, 2^28874445 is an apocalyptic number.

It is an amenable number.

28874445 is a deficient number, since it is larger than the sum of its proper divisors (17324691).

28874445 is a wasteful number, since it uses less digits than its factorization.

28874445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924971.

The product of its digits is 286720, while the sum is 42.

The square root of 28874445 is about 5373.4946729293. The cubic root of 28874445 is about 306.7876563920.

The spelling of 28874445 in words is "twenty-eight million, eight hundred seventy-four thousand, four hundred forty-five".