28697844 has 24 divisors (see below), whose sum is σ = 76527808. Its totient is φ = 8199360.

The previous prime is 28697839. The next prime is 28697861. The reversal of 28697844 is 44879682.

It is a junction number, because it is equal to n+sod(n) for n = 28697793 and 28697802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170737 + ... + 170904.

Almost surely, 2^28697844 is an apocalyptic number.

It is an amenable number.

28697844 is an abundant number, since it is smaller than the sum of its proper divisors (47829964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28697844 is a wasteful number, since it uses less digits than its factorization.

28697844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341655 (or 341653 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The square root of 28697844 is about 5357.0368675229. The cubic root of 28697844 is about 306.1609218088.

The spelling of 28697844 in words is "twenty-eight million, six hundred ninety-seven thousand, eight hundred forty-four".