28844642 has 4 divisors (see below), whose sum is σ = 43266966. Its totient is φ = 14422320.

The previous prime is 28844623. The next prime is 28844659. The reversal of 28844642 is 24644882.

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

It can be written as a sum of positive squares in only one way, i.e., 26739241 + 2105401 = 5171^2 + 1451^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28844596 and 28844605.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7211159 + ... + 7211162.

Almost surely, 2^28844642 is an apocalyptic number.

28844642 is a deficient number, since it is larger than the sum of its proper divisors (14422324).

28844642 is a wasteful number, since it uses less digits than its factorization.

28844642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14422323.

The product of its digits is 98304, while the sum is 38.

The square root of 28844642 is about 5370.7208082342. The cubic root of 28844642 is about 306.6820689072.

The spelling of 28844642 in words is "twenty-eight million, eight hundred forty-four thousand, six hundred forty-two".