28201225032 has 108 divisors (see below), whose sum is σ = 79420265145. Its totient is φ = 9387583776.

The previous prime is 28201224983. The next prime is 28201225043. The reversal of 28201225032 is 23052210282.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 18210422916 + 9990802116 = 134946^2 + 99954^2 .

It is a tau number, because it is divible by the number of its divisors (108).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=118746.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 28201224987 and 28201225005.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 38473338 + ... + 38474070.

Almost surely, 2^28201225032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28201225032

28201225032 is an abundant number, since it is smaller than the sum of its proper divisors (51219040113).

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

28201225032 is an frugal number, since it uses more digits than its factorization.

28201225032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The spelling of 28201225032 in words is "twenty-eight billion, two hundred one million, two hundred twenty-five thousand, thirty-two".