28922133 has 4 divisors (see below), whose sum is σ = 38562848. Its totient is φ = 19281420.

The previous prime is 28922111. The next prime is 28922143. The reversal of 28922133 is 33122982.

It is a happy number.

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.

It is not a de Polignac number, because 28922133 - 2⁸ = 28921877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28922133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28922143) 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, 4820353 + ... + 4820358.

It is an arithmetic number, because the mean of its divisors is an integer number (9640712).

Almost surely, 2^28922133 is an apocalyptic number.

It is an amenable number.

28922133 is a deficient number, since it is larger than the sum of its proper divisors (9640715).

28922133 is an equidigital number, since it uses as much as digits as its factorization.

28922133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9640714.

The product of its digits is 5184, while the sum is 30.

The square root of 28922133 is about 5377.9301780518. The cubic root of 28922133 is about 306.9564566692.

It can be divided in two parts, 289 and 22133, that added together give a palindrome (22422).

The spelling of 28922133 in words is "twenty-eight million, nine hundred twenty-two thousand, one hundred thirty-three".