28252245165 has 32 divisors (see below), whose sum is σ = 45502634496. Its totient is φ = 14968514880.

The previous prime is 28252245163. The next prime is 28252245169. The reversal of 28252245165 is 56154225282.

It is a happy number.

It is not a de Polignac number, because 28252245165 - 2¹ = 28252245163 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28252245163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1395042 + ... + 1415148.

It is an arithmetic number, because the mean of its divisors is an integer number (1421957328).

Almost surely, 2^28252245165 is an apocalyptic number.

It is an amenable number.

28252245165 is a deficient number, since it is larger than the sum of its proper divisors (17250389331).

28252245165 is a wasteful number, since it uses less digits than its factorization.

28252245165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20729.

The product of its digits is 384000, while the sum is 42.

The spelling of 28252245165 in words is "twenty-eight billion, two hundred fifty-two million, two hundred forty-five thousand, one hundred sixty-five".