28822641 has 4 divisors (see below), whose sum is σ = 38430192. Its totient is φ = 19215092.

The previous prime is 28822637. The next prime is 28822643. The reversal of 28822641 is 14622882.

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 a cyclic number.

It is not a de Polignac number, because 28822641 - 2² = 28822637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28822643) 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, 4803771 + ... + 4803776.

It is an arithmetic number, because the mean of its divisors is an integer number (9607548).

Almost surely, 2^28822641 is an apocalyptic number.

It is an amenable number.

28822641 is a deficient number, since it is larger than the sum of its proper divisors (9607551).

28822641 is an equidigital number, since it uses as much as digits as its factorization.

28822641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9607550.

The product of its digits is 12288, while the sum is 33.

The square root of 28822641 is about 5368.6721822067. The cubic root of 28822641 is about 306.6040760468.

The spelling of 28822641 in words is "twenty-eight million, eight hundred twenty-two thousand, six hundred forty-one".