28446409860 has 192 divisors, whose sum is σ = 89616844800. Its totient is φ = 6683084800.

The previous prime is 28446409787. The next prime is 28446409879. The reversal of 28446409860 is 6890464482.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2759596 + ... + 2769884.

It is an arithmetic number, because the mean of its divisors is an integer number (466754400).

Almost surely, 2^28446409860 is an apocalyptic number.

28446409860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28446409860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44808422400).

28446409860 is an abundant number, since it is smaller than the sum of its proper divisors (61170434940).

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

28446409860 is a wasteful number, since it uses less digits than its factorization.

28446409860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10442 (or 10440 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 51.

The spelling of 28446409860 in words is "twenty-eight billion, four hundred forty-six million, four hundred nine thousand, eight hundred sixty".