29971389 has 24 divisors (see below), whose sum is σ = 47993088. Its totient is φ = 16571520.

The previous prime is 29971363. The next prime is 29971393. The reversal of 29971389 is 98317992.

It is not a de Polignac number, because 29971389 - 2⁸ = 29971133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29971339) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1269 + ... + 7845.

It is an arithmetic number, because the mean of its divisors is an integer number (1999712).

Almost surely, 2^29971389 is an apocalyptic number.

It is an amenable number.

29971389 is a deficient number, since it is larger than the sum of its proper divisors (18021699).

29971389 is a wasteful number, since it uses less digits than its factorization.

29971389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6625 (or 6618 counting only the distinct ones).

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

The square root of 29971389 is about 5474.6131370171. The cubic root of 29971389 is about 310.6244402556.

The spelling of 29971389 in words is "twenty-nine million, nine hundred seventy-one thousand, three hundred eighty-nine".