28989941 has 2 divisors, whose sum is σ = 28989942. Its totient is φ = 28989940.

The previous prime is 28989931. The next prime is 28989949. The reversal of 28989941 is 14998982.

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., 24700900 + 4289041 = 4970^2 + 2071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28989941 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28989941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28989949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14494970 + 14494971.

It is an arithmetic number, because the mean of its divisors is an integer number (14494971).

Almost surely, 2^28989941 is an apocalyptic number.

It is an amenable number.

28989941 is a deficient number, since it is larger than the sum of its proper divisors (1).

28989941 is an equidigital number, since it uses as much as digits as its factorization.

28989941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 50.

The square root of 28989941 is about 5384.2307714287. The cubic root of 28989941 is about 307.1961561217.

The spelling of 28989941 in words is "twenty-eight million, nine hundred eighty-nine thousand, nine hundred forty-one".