29928809 has 2 divisors, whose sum is σ = 29928810. Its totient is φ = 29928808.

The previous prime is 29928803. The next prime is 29928839. The reversal of 29928809 is 90882992.

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., 29735209 + 193600 = 5453^2 + 440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29928809 is a prime.

It is not a weakly prime, because it can be changed into another prime (29928803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14964404 + 14964405.

It is an arithmetic number, because the mean of its divisors is an integer number (14964405).

Almost surely, 2^29928809 is an apocalyptic number.

It is an amenable number.

29928809 is a deficient number, since it is larger than the sum of its proper divisors (1).

29928809 is an equidigital number, since it uses as much as digits as its factorization.

29928809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 29928809 is about 5470.7228955596. The cubic root of 29928809 is about 310.4772703759.

The spelling of 29928809 in words is "twenty-nine million, nine hundred twenty-eight thousand, eight hundred nine".