28410989 has 2 divisors, whose sum is σ = 28410990. Its totient is φ = 28410988.

The previous prime is 28410937. The next prime is 28411013. The reversal of 28410989 is 98901482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21949225 + 6461764 = 4685^2 + 2542^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28410989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28410289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14205494 + 14205495.

It is an arithmetic number, because the mean of its divisors is an integer number (14205495).

Almost surely, 2^28410989 is an apocalyptic number.

It is an amenable number.

28410989 is a deficient number, since it is larger than the sum of its proper divisors (1).

28410989 is an equidigital number, since it uses as much as digits as its factorization.

28410989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 28410989 is about 5330.1959626265. The cubic root of 28410989 is about 305.1374065097.

The spelling of 28410989 in words is "twenty-eight million, four hundred ten thousand, nine hundred eighty-nine".