12400665828 has 24 divisors (see below), whose sum is σ = 29108154432. Its totient is φ = 4108802784.

The previous prime is 12400665779. The next prime is 12400665839. The reversal of 12400665828 is 82856600421.

It is a self number, because there is not a number n which added to its sum of digits gives 12400665828.

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, 3091975 + ... + 3095982.

It is an arithmetic number, because the mean of its divisors is an integer number (1212839768).

Almost surely, 2^12400665828 is an apocalyptic number.

It is an amenable number.

12400665828 is an abundant number, since it is smaller than the sum of its proper divisors (16707488604).

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

12400665828 is a wasteful number, since it uses less digits than its factorization.

12400665828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6188131 (or 6188129 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 12400665828 in words is "twelve billion, four hundred million, six hundred sixty-five thousand, eight hundred twenty-eight".