28253272320 has 432 divisors, whose sum is σ = 120316315392. Its totient is φ = 5960908800.

The previous prime is 28253272309. The next prime is 28253272343. The reversal of 28253272320 is 2327235282.

It is a happy number.

28253272320 is a `hidden beast` number, since 2 + 8 + 2 + 5 + 327 + 2 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1034845 + ... + 1061795.

Almost surely, 2^28253272320 is an apocalyptic number.

28253272320 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 28253272320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60158157696).

28253272320 is an abundant number, since it is smaller than the sum of its proper divisors (92063043072).

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

28253272320 is a wasteful number, since it uses less digits than its factorization.

28253272320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26998 (or 26981 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 28253272320 in words is "twenty-eight billion, two hundred fifty-three million, two hundred seventy-two thousand, three hundred twenty".