28216825572 has 24 divisors (see below), whose sum is σ = 70903818496. Its totient is φ = 8682100128.

The previous prime is 28216825529. The next prime is 28216825597. The reversal of 28216825572 is 27552861282.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90438388 + ... + 90438699.

Almost surely, 2^28216825572 is an apocalyptic number.

It is an amenable number.

28216825572 is an abundant number, since it is smaller than the sum of its proper divisors (42686992924).

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

28216825572 is a wasteful number, since it uses less digits than its factorization.

28216825572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180877107 (or 180877105 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 48.

The spelling of 28216825572 in words is "twenty-eight billion, two hundred sixteen million, eight hundred twenty-five thousand, five hundred seventy-two".