28857044 has 24 divisors (see below), whose sum is σ = 51383808. Its totient is φ = 14178560.

The previous prime is 28856983. The next prime is 28857047. The reversal of 28857044 is 44075882.

It is a junction number, because it is equal to n+sod(n) for n = 28856989 and 28857007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28857047) 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, 81572 + ... + 81924.

It is an arithmetic number, because the mean of its divisors is an integer number (2140992).

Almost surely, 2^28857044 is an apocalyptic number.

It is an amenable number.

28857044 is a deficient number, since it is larger than the sum of its proper divisors (22526764).

28857044 is a wasteful number, since it uses less digits than its factorization.

28857044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 28857044 is about 5371.8752777778. The cubic root of 28857044 is about 306.7260161336.

The spelling of 28857044 in words is "twenty-eight million, eight hundred fifty-seven thousand, forty-four".