28904849 has 2 divisors, whose sum is σ = 28904850. Its totient is φ = 28904848.

The previous prime is 28904839. The next prime is 28904891. The reversal of 28904849 is 94840982.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19492225 + 9412624 = 4415^2 + 3068^2 .

It is a cyclic number.

It is not a de Polignac number, because 28904849 - 2⁸ = 28904593 is a prime.

It is not a weakly prime, because it can be changed into another prime (28904809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14452424 + 14452425.

It is an arithmetic number, because the mean of its divisors is an integer number (14452425).

Almost surely, 2^28904849 is an apocalyptic number.

It is an amenable number.

28904849 is a deficient number, since it is larger than the sum of its proper divisors (1).

28904849 is an equidigital number, since it uses as much as digits as its factorization.

28904849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 28904849 is about 5376.3229999694. The cubic root of 28904849 is about 306.8952982869.

The spelling of 28904849 in words is "twenty-eight million, nine hundred four thousand, eight hundred forty-nine".