28288633523 has 4 divisors (see below), whose sum is σ = 28290896760. Its totient is φ = 28286370288.

The previous prime is 28288633517. The next prime is 28288633543. The reversal of 28288633523 is 32533688282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28288633523 - 2⁶ = 28288633459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28288633543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112765 + ... + 1137902.

It is an arithmetic number, because the mean of its divisors is an integer number (7072724190).

Almost surely, 2^28288633523 is an apocalyptic number.

28288633523 is a deficient number, since it is larger than the sum of its proper divisors (2263237).

28288633523 is a wasteful number, since it uses less digits than its factorization.

28288633523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263236.

The product of its digits is 3317760, while the sum is 50.

The spelling of 28288633523 in words is "twenty-eight billion, two hundred eighty-eight million, six hundred thirty-three thousand, five hundred twenty-three".