29628881 has 2 divisors, whose sum is σ = 29628882. Its totient is φ = 29628880.

The previous prime is 29628827. The next prime is 29628887. The reversal of 29628881 is 18882692.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27040000 + 2588881 = 5200^2 + 1609^2 .

It is a cyclic number.

It is not a de Polignac number, because 29628881 - 2¹⁸ = 29366737 is a prime.

It is a super-2 number, since 2×29628881² = 1755741178624322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (29628887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14814440 + 14814441.

It is an arithmetic number, because the mean of its divisors is an integer number (14814441).

Almost surely, 2^29628881 is an apocalyptic number.

It is an amenable number.

29628881 is a deficient number, since it is larger than the sum of its proper divisors (1).

29628881 is an equidigital number, since it uses as much as digits as its factorization.

29628881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 44.

The square root of 29628881 is about 5443.2417730613. The cubic root of 29628881 is about 309.4366494290.

The spelling of 29628881 in words is "twenty-nine million, six hundred twenty-eight thousand, eight hundred eighty-one".