29439889 has 4 divisors (see below), whose sum is σ = 29480256. Its totient is φ = 29399524.

The previous prime is 29439871. The next prime is 29439899. The reversal of 29439889 is 98893492.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29439889 is a prime.

It is a super-5 number, since 5×29439889⁵ (a number of 39 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29439859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19069 + ... + 20554.

It is an arithmetic number, because the mean of its divisors is an integer number (7370064).

Almost surely, 2^29439889 is an apocalyptic number.

It is an amenable number.

29439889 is a deficient number, since it is larger than the sum of its proper divisors (40367).

29439889 is an equidigital number, since it uses as much as digits as its factorization.

29439889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40366.

The product of its digits is 1119744, while the sum is 52.

The square root of 29439889 is about 5425.8537577049. The cubic root of 29439889 is about 308.7773171042. Note that the first 3 decimals are identical.

The spelling of 29439889 in words is "twenty-nine million, four hundred thirty-nine thousand, eight hundred eighty-nine".