28881841 has 2 divisors, whose sum is σ = 28881842. Its totient is φ = 28881840.

The previous prime is 28881833. The next prime is 28881869. The reversal of 28881841 is 14818882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24216241 + 4665600 = 4921^2 + 2160^2 .

It is a cyclic number.

It is not a de Polignac number, because 28881841 - 2³ = 28881833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28881794 and 28881803.

It is not a weakly prime, because it can be changed into another prime (28888841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14440920 + 14440921.

It is an arithmetic number, because the mean of its divisors is an integer number (14440921).

Almost surely, 2^28881841 is an apocalyptic number.

It is an amenable number.

28881841 is a deficient number, since it is larger than the sum of its proper divisors (1).

28881841 is an equidigital number, since it uses as much as digits as its factorization.

28881841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32768, while the sum is 40.

The square root of 28881841 is about 5374.1828216018. The cubic root of 28881841 is about 306.8138480389.

The spelling of 28881841 in words is "twenty-eight million, eight hundred eighty-one thousand, eight hundred forty-one".