28612487100 has 72 divisors (see below), whose sum is σ = 82823948928. Its totient is φ = 7626449600.

The previous prime is 28612487081. The next prime is 28612487107. The reversal of 28612487100 is 178421682.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28612487107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 659065 + ... + 701135.

It is an arithmetic number, because the mean of its divisors is an integer number (1150332624).

Almost surely, 2^28612487100 is an apocalyptic number.

28612487100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28612487100 is an abundant number, since it is smaller than the sum of its proper divisors (54211461828).

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

28612487100 is a wasteful number, since it uses less digits than its factorization.

28612487100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44355 (or 44348 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The spelling of 28612487100 in words is "twenty-eight billion, six hundred twelve million, four hundred eighty-seven thousand, one hundred".