28040996 has 12 divisors (see below), whose sum is σ = 49222320. Its totient is φ = 13977480.

The previous prime is 28040993. The next prime is 28041011. The reversal of 28040996 is 69904082.

It is not an unprimeable number, because it can be changed into a prime (28040993) 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, 9266 + ... + 11913.

It is an arithmetic number, because the mean of its divisors is an integer number (4101860).

Almost surely, 2^28040996 is an apocalyptic number.

It is an amenable number.

28040996 is a deficient number, since it is larger than the sum of its proper divisors (21181324).

28040996 is a wasteful number, since it uses less digits than its factorization.

28040996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21514 (or 21512 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 28040996 is about 5295.3749631164. The cubic root of 28040996 is about 303.8070249195.

The spelling of 28040996 in words is "twenty-eight million, forty thousand, nine hundred ninety-six".