29720889 has 24 divisors (see below), whose sum is σ = 47410272. Its totient is φ = 17790720.

The previous prime is 29720861. The next prime is 29720891. The reversal of 29720889 is 98802792.

It is not a de Polignac number, because 29720889 - 2¹⁷ = 29589817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29720839) 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 in 23 ways as a sum of consecutive naturals, for example, 6409 + ... + 10025.

It is an arithmetic number, because the mean of its divisors is an integer number (1975428).

Almost surely, 2^29720889 is an apocalyptic number.

It is an amenable number.

29720889 is a deficient number, since it is larger than the sum of its proper divisors (17689383).

29720889 is a wasteful number, since it uses less digits than its factorization.

29720889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3717 (or 3714 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 29720889 is about 5451.6868031830. The cubic root of 29720889 is about 309.7566213235.

The spelling of 29720889 in words is "twenty-nine million, seven hundred twenty thousand, eight hundred eighty-nine".