28809464473920 has 448 divisors, whose sum is σ = 99352410587136. Its totient is φ = 7030721617920.

The previous prime is 28809464473837. The next prime is 28809464474003. The reversal of 28809464473920 is 2937446490882.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28809464473837) and next prime (28809464474003).

It is a congruent number.

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, 2547025065 + ... + 2547036375.

It is an arithmetic number, because the mean of its divisors is an integer number (221768773632).

Almost surely, 2^{28809464473920} is an apocalyptic number.

28809464473920 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 28809464473920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49676205293568).

28809464473920 is an abundant number, since it is smaller than the sum of its proper divisors (70542946113216).

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

28809464473920 is a wasteful number, since it uses less digits than its factorization.

28809464473920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13078 (or 13068 counting only the distinct ones).

The product of its (nonzero) digits is 167215104, while the sum is 66.

The spelling of 28809464473920 in words is "twenty-eight trillion, eight hundred nine billion, four hundred sixty-four million, four hundred seventy-three thousand, nine hundred twenty".