28447841 has 2 divisors, whose sum is σ = 28447842. Its totient is φ = 28447840.

The previous prime is 28447823. The next prime is 28447847. The reversal of 28447841 is 14874482.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26832400 + 1615441 = 5180^2 + 1271^2 .

It is a cyclic number.

It is not a de Polignac number, because 28447841 - 2¹⁴ = 28431457 is a prime.

It is a super-2 number, since 2×28447841² = 1618559315122562, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28447795 and 28447804.

It is not a weakly prime, because it can be changed into another prime (28447847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14223920 + 14223921.

It is an arithmetic number, because the mean of its divisors is an integer number (14223921).

Almost surely, 2^28447841 is an apocalyptic number.

It is an amenable number.

28447841 is a deficient number, since it is larger than the sum of its proper divisors (1).

28447841 is an equidigital number, since it uses as much as digits as its factorization.

28447841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57344, while the sum is 38.

The square root of 28447841 is about 5333.6517509114. The cubic root of 28447841 is about 305.2692811312.

The spelling of 28447841 in words is "twenty-eight million, four hundred forty-seven thousand, eight hundred forty-one".