29439986 has 8 divisors (see below), whose sum is σ = 44369904. Its totient is φ = 14650020.

The previous prime is 29439979. The next prime is 29439989. The reversal of 29439986 is 68993492.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (29439989) 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, 34460 + ... + 35303.

It is an arithmetic number, because the mean of its divisors is an integer number (5546238).

Almost surely, 2^29439986 is an apocalyptic number.

29439986 is a deficient number, since it is larger than the sum of its proper divisors (14929918).

29439986 is a wasteful number, since it uses less digits than its factorization.

29439986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69976.

The product of its digits is 839808, while the sum is 50.

The square root of 29439986 is about 5425.8626963829. The cubic root of 29439986 is about 308.7776562287. Note that the first 3 decimals are identical.

The spelling of 29439986 in words is "twenty-nine million, four hundred thirty-nine thousand, nine hundred eighty-six".