28403681108 has 12 divisors (see below), whose sum is σ = 54225209472. Its totient is φ = 12910764120.

The previous prime is 28403681101. The next prime is 28403681123. The reversal of 28403681108 is 80118630482.

It is a super-2 number, since 2×28403681108² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28403681101) 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, 322769060 + ... + 322769147.

It is an arithmetic number, because the mean of its divisors is an integer number (4518767456).

Almost surely, 2^28403681108 is an apocalyptic number.

It is an amenable number.

28403681108 is a deficient number, since it is larger than the sum of its proper divisors (25821528364).

28403681108 is a wasteful number, since it uses less digits than its factorization.

28403681108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645538222 (or 645538220 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 28403681108 in words is "twenty-eight billion, four hundred three million, six hundred eighty-one thousand, one hundred eight".