28881673 has 2 divisors, whose sum is σ = 28881674. Its totient is φ = 28881672.

The previous prime is 28881659. The next prime is 28881679. The reversal of 28881673 is 37618882.

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., 28869129 + 12544 = 5373^2 + 112^2 .

It is a cyclic number.

It is not a de Polignac number, because 28881673 - 2⁹ = 28881161 is a prime.

It is not a weakly prime, because it can be changed into another prime (28881679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14440836 + 14440837.

It is an arithmetic number, because the mean of its divisors is an integer number (14440837).

Almost surely, 2^28881673 is an apocalyptic number.

It is an amenable number.

28881673 is a deficient number, since it is larger than the sum of its proper divisors (1).

28881673 is an equidigital number, since it uses as much as digits as its factorization.

28881673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 43.

The square root of 28881673 is about 5374.1671912958. The cubic root of 28881673 is about 306.8132531458.

The spelling of 28881673 in words is "twenty-eight million, eight hundred eighty-one thousand, six hundred seventy-three".