28757225280 has 448 divisors, whose sum is σ = 106472443392. Its totient is φ = 6440878080.

The previous prime is 28757225221. The next prime is 28757225293. The reversal of 28757225280 is 8252275782.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 102338740 + ... + 102339020.

It is an arithmetic number, because the mean of its divisors is an integer number (237661704).

Almost surely, 2^28757225280 is an apocalyptic number.

28757225280 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 28757225280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53236221696).

28757225280 is an abundant number, since it is smaller than the sum of its proper divisors (77715218112).

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

28757225280 is a wasteful number, since it uses less digits than its factorization.

28757225280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 1254400, while the sum is 48.

The spelling of 28757225280 in words is "twenty-eight billion, seven hundred fifty-seven million, two hundred twenty-five thousand, two hundred eighty".