28489129 has 2 divisors, whose sum is σ = 28489130. Its totient is φ = 28489128.

The previous prime is 28489099. The next prime is 28489133. The reversal of 28489129 is 92198482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26543104 + 1946025 = 5152^2 + 1395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28489129 is a prime.

It is not a weakly prime, because it can be changed into another prime (28489429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14244564 + 14244565.

It is an arithmetic number, because the mean of its divisors is an integer number (14244565).

Almost surely, 2^28489129 is an apocalyptic number.

It is an amenable number.

28489129 is a deficient number, since it is larger than the sum of its proper divisors (1).

28489129 is an equidigital number, since it uses as much as digits as its factorization.

28489129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 43.

The square root of 28489129 is about 5337.5208664698. The cubic root of 28489129 is about 305.4168947395.

The spelling of 28489129 in words is "twenty-eight million, four hundred eighty-nine thousand, one hundred twenty-nine".