28040073904 has 40 divisors (see below), whose sum is σ = 60024417120. Its totient is φ = 12621616128.

The previous prime is 28040073889. The next prime is 28040073913. The reversal of 28040073904 is 40937004082.

It is a happy 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, 2234799 + ... + 2247310.

It is an arithmetic number, because the mean of its divisors is an integer number (1500610428).

Almost surely, 2^28040073904 is an apocalyptic number.

It is an amenable number.

28040073904 is an abundant number, since it is smaller than the sum of its proper divisors (31984343216).

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

28040073904 is a wasteful number, since it uses less digits than its factorization.

28040073904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482157 (or 4482151 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

Adding to 28040073904 its reverse (40937004082), we get a palindrome (68977077986).

The spelling of 28040073904 in words is "twenty-eight billion, forty million, seventy-three thousand, nine hundred four".