28455622272 has 384 divisors, whose sum is σ = 105510921600. Its totient is φ = 7390310400.

The previous prime is 28455622267. The next prime is 28455622369. The reversal of 28455622272 is 27222655482.

28455622272 is a `hidden beast` number, since 2 + 8 + 4 + 556 + 2 + 22 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

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, 2922372 + ... + 2932092.

It is an arithmetic number, because the mean of its divisors is an integer number (274768025).

Almost surely, 2^28455622272 is an apocalyptic number.

28455622272 is a gapful number since it is divisible by the number (22) 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 28455622272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52755460800).

28455622272 is an abundant number, since it is smaller than the sum of its proper divisors (77055299328).

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

28455622272 is a wasteful number, since it uses less digits than its factorization.

28455622272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9773 (or 9744 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 45.

The spelling of 28455622272 in words is "twenty-eight billion, four hundred fifty-five million, six hundred twenty-two thousand, two hundred seventy-two".