29691985 has 8 divisors (see below), whose sum is σ = 35665920. Its totient is φ = 23729904.

The previous prime is 29691967. The next prime is 29691989. The reversal of 29691985 is 58919692.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29691985 is a prime.

It is a super-2 number, since 2×29691985² = 1763227946480450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (29691989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4074 + ... + 8716.

It is an arithmetic number, because the mean of its divisors is an integer number (4458240).

Almost surely, 2^29691985 is an apocalyptic number.

It is an amenable number.

29691985 is a deficient number, since it is larger than the sum of its proper divisors (5973935).

29691985 is a wasteful number, since it uses less digits than its factorization.

29691985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5927.

The product of its digits is 349920, while the sum is 49.

The square root of 29691985 is about 5449.0352357092. The cubic root of 29691985 is about 309.6561744702.

The spelling of 29691985 in words is "twenty-nine million, six hundred ninety-one thousand, nine hundred eighty-five".