28533223423 has 4 divisors (see below), whose sum is σ = 28577324880. Its totient is φ = 28489121968.

The previous prime is 28533223409. The next prime is 28533223427. The reversal of 28533223423 is 32432233582.

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 28533223423 - 2²¹ = 28531126271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28533223427) 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, 22049758 + ... + 22051051.

It is an arithmetic number, because the mean of its divisors is an integer number (7144331220).

Almost surely, 2^28533223423 is an apocalyptic number.

28533223423 is a deficient number, since it is larger than the sum of its proper divisors (44101457).

28533223423 is an equidigital number, since it uses as much as digits as its factorization.

28533223423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44101456.

The product of its digits is 207360, while the sum is 37.

The spelling of 28533223423 in words is "twenty-eight billion, five hundred thirty-three million, two hundred twenty-three thousand, four hundred twenty-three".