29439999 has 6 divisors (see below), whose sum is σ = 42524456. Its totient is φ = 19626660.

The previous prime is 29439989. The next prime is 29440007. The reversal of 29439999 is 99993492.

It is not a de Polignac number, because 29439999 - 2⁵ = 29439967 is a prime.

It is a super-2 number, since 2×29439999² = 1733427082240002, which contains 22 as substring.

It is a Duffinian number.

29439999 is a modest number, since divided by 9999 gives 2943 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29439979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1635547 + ... + 1635564.

Almost surely, 2^29439999 is an apocalyptic number.

29439999 is a deficient number, since it is larger than the sum of its proper divisors (13084457).

29439999 is a wasteful number, since it uses less digits than its factorization.

29439999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3271117 (or 3271114 counting only the distinct ones).

The product of its digits is 1417176, while the sum is 54.

The square root of 29439999 is about 5425.8638943490. The cubic root of 29439999 is about 308.7777016783. Note that the first 4 decimals are identical.

The spelling of 29439999 in words is "twenty-nine million, four hundred thirty-nine thousand, nine hundred ninety-nine".