28109625412 has 24 divisors (see below), whose sum is σ = 55514309760. Its totient is φ = 12336512160.

The previous prime is 28109625403. The next prime is 28109625463. The reversal of 28109625412 is 21452690182.

It is a happy number.

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, 11013468 + ... + 11016019.

It is an arithmetic number, because the mean of its divisors is an integer number (2313096240).

Almost surely, 2^28109625412 is an apocalyptic number.

28109625412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28109625412 is a deficient number, since it is larger than the sum of its proper divisors (27404684348).

28109625412 is a wasteful number, since it uses less digits than its factorization.

28109625412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22029531 (or 22029529 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 28109625412 in words is "twenty-eight billion, one hundred nine million, six hundred twenty-five thousand, four hundred twelve".