29939871 has 12 divisors (see below), whose sum is σ = 43227528. Its totient is φ = 18424224.

The previous prime is 29939857. The next prime is 29939891. The reversal of 29939871 is 17893992.

It is not a de Polignac number, because 29939871 - 2⁶ = 29939807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29939871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29939851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29020 + ... + 30033.

It is an arithmetic number, because the mean of its divisors is an integer number (3602294).

Almost surely, 2^29939871 is an apocalyptic number.

29939871 is a deficient number, since it is larger than the sum of its proper divisors (13287657).

29939871 is a wasteful number, since it uses less digits than its factorization.

29939871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59082 (or 59069 counting only the distinct ones).

The product of its digits is 244944, while the sum is 48.

The square root of 29939871 is about 5471.7338202804. The cubic root of 29939871 is about 310.5155175433.

The spelling of 29939871 in words is "twenty-nine million, nine hundred thirty-nine thousand, eight hundred seventy-one".