28080040388 has 24 divisors (see below), whose sum is σ = 49621626432. Its totient is φ = 13902551264.

The previous prime is 28080040379. The next prime is 28080040393. The reversal of 28080040388 is 88304008082.

It is a super-2 number, since 2×28080040388² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1023506 + ... + 1050582.

It is an arithmetic number, because the mean of its divisors is an integer number (2067567768).

Almost surely, 2^28080040388 is an apocalyptic number.

It is an amenable number.

28080040388 is a deficient number, since it is larger than the sum of its proper divisors (21541586044).

28080040388 is a wasteful number, since it uses less digits than its factorization.

28080040388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29611 (or 29609 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 41.

The spelling of 28080040388 in words is "twenty-eight billion, eighty million, forty thousand, three hundred eighty-eight".