28444874 has 8 divisors (see below), whose sum is σ = 42903588. Its totient is φ = 14143680.

The previous prime is 28444837. The next prime is 28444877. The reversal of 28444874 is 47844482.

It can be written as a sum of positive squares in 2 ways, for example, as 28015849 + 429025 = 5293^2 + 655^2 .

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

It is a super-2 number, since 2×28444874² = 1618221713751752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28444877) 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, 38927 + ... + 39650.

Almost surely, 2^28444874 is an apocalyptic number.

28444874 is a deficient number, since it is larger than the sum of its proper divisors (14458714).

28444874 is a wasteful number, since it uses less digits than its factorization.

28444874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78760.

The product of its digits is 229376, while the sum is 41.

The square root of 28444874 is about 5333.3736040146. The cubic root of 28444874 is about 305.2586679597.

The spelling of 28444874 in words is "twenty-eight million, four hundred forty-four thousand, eight hundred seventy-four".