28408380836 has 48 divisors (see below), whose sum is σ = 54671984640. Its totient is φ = 12809076000.

The previous prime is 28408380829. The next prime is 28408380851. The reversal of 28408380836 is 63808380482.

It is a super-2 number, since 2×28408380836² (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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2882405 + ... + 2892243.

It is an arithmetic number, because the mean of its divisors is an integer number (1138999680).

Almost surely, 2^28408380836 is an apocalyptic number.

It is an amenable number.

28408380836 is a deficient number, since it is larger than the sum of its proper divisors (26263603804).

28408380836 is a wasteful number, since it uses less digits than its factorization.

28408380836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10376 (or 10374 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 50.

The spelling of 28408380836 in words is "twenty-eight billion, four hundred eight million, three hundred eighty thousand, eight hundred thirty-six".