28891387763900 has 36 divisors (see below), whose sum is σ = 62701869511008. Its totient is φ = 11555161914240.

The previous prime is 28891387763893. The next prime is 28891387763911. The reversal of 28891387763900 is 936778319882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16581044 + ... + 18240443.

It is an arithmetic number, because the mean of its divisors is an integer number (1741718597528).

Almost surely, 2^{28891387763900} is an apocalyptic number.

28891387763900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28891387763900 is an abundant number, since it is smaller than the sum of its proper divisors (33810481747108).

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

28891387763900 is a wasteful number, since it uses less digits than its factorization.

28891387763900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34829798 (or 34829791 counting only the distinct ones).

The product of its (nonzero) digits is 219469824, while the sum is 71.

The spelling of 28891387763900 in words is "twenty-eight trillion, eight hundred ninety-one billion, three hundred eighty-seven million, seven hundred sixty-three thousand, nine hundred".