28308124433 has 4 divisors (see below), whose sum is σ = 28309476660. Its totient is φ = 28306772208.

The previous prime is 28308124423. The next prime is 28308124441. The reversal of 28308124433 is 33442180382.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11192158849 + 17115965584 = 105793^2 + 130828^2 .

It is a cyclic number.

It is not a de Polignac number, because 28308124433 - 2⁴ = 28308124417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28308124423) 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, 644210 + ... + 686747.

It is an arithmetic number, because the mean of its divisors is an integer number (7077369165).

Almost surely, 2^28308124433 is an apocalyptic number.

It is an amenable number.

28308124433 is a deficient number, since it is larger than the sum of its proper divisors (1352227).

28308124433 is a wasteful number, since it uses less digits than its factorization.

28308124433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352226.

The product of its (nonzero) digits is 110592, while the sum is 38.

The spelling of 28308124433 in words is "twenty-eight billion, three hundred eight million, one hundred twenty-four thousand, four hundred thirty-three".