28407870782320 has 20 divisors (see below), whose sum is σ = 66048299569080. Its totient is φ = 11363148312896.

The previous prime is 28407870782311. The next prime is 28407870782323. The reversal of 28407870782320 is 2328707870482.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28407870782323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177549192310 + ... + 177549192469.

It is an arithmetic number, because the mean of its divisors is an integer number (3302414978454).

Almost surely, 2^{28407870782320} is an apocalyptic number.

28407870782320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28407870782320 is an abundant number, since it is smaller than the sum of its proper divisors (37640428786760).

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

28407870782320 is a wasteful number, since it uses less digits than its factorization.

28407870782320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355098384792 (or 355098384786 counting only the distinct ones).

The product of its (nonzero) digits is 16859136, while the sum is 58.

The spelling of 28407870782320 in words is "twenty-eight trillion, four hundred seven billion, eight hundred seventy million, seven hundred eighty-two thousand, three hundred twenty".