28447633 has 4 divisors (see below), whose sum is σ = 28489968. Its totient is φ = 28405300.

The previous prime is 28447609. The next prime is 28447649. The reversal of 28447633 is 33674482.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33674482 = 2 ⋅16837241.

It is a cyclic number.

It is not a de Polignac number, because 28447633 - 2¹³ = 28439441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28447592 and 28447601.

It is not an unprimeable number, because it can be changed into a prime (28447603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20143 + ... + 21508.

It is an arithmetic number, because the mean of its divisors is an integer number (7122492).

Almost surely, 2^28447633 is an apocalyptic number.

It is an amenable number.

28447633 is a deficient number, since it is larger than the sum of its proper divisors (42335).

28447633 is an equidigital number, since it uses as much as digits as its factorization.

28447633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42334.

The product of its digits is 96768, while the sum is 37.

The square root of 28447633 is about 5333.6322520399. The cubic root of 28447633 is about 305.2685371244.

The spelling of 28447633 in words is "twenty-eight million, four hundred forty-seven thousand, six hundred thirty-three".