28219923253 has 4 divisors (see below), whose sum is σ = 28820347200. Its totient is φ = 27619499308.

The previous prime is 28219923241. The next prime is 28219923343. The reversal of 28219923253 is 35232991282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35232991282 = 2 ⋅17616495641.

It is a cyclic number.

It is not a de Polignac number, because 28219923253 - 2⁹ = 28219922741 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 (28219923353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300211903 + ... + 300211996.

It is an arithmetic number, because the mean of its divisors is an integer number (7205086800).

Almost surely, 2^28219923253 is an apocalyptic number.

It is an amenable number.

28219923253 is a deficient number, since it is larger than the sum of its proper divisors (600423947).

28219923253 is an equidigital number, since it uses as much as digits as its factorization.

28219923253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600423946.

The product of its digits is 466560, while the sum is 46.

The spelling of 28219923253 in words is "twenty-eight billion, two hundred nineteen million, nine hundred twenty-three thousand, two hundred fifty-three".