29931986 has 8 divisors (see below), whose sum is σ = 51312000. Its totient is φ = 12827988.

The previous prime is 29931977. The next prime is 29931989. The reversal of 29931986 is 68913992.

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

It is a self number, because there is not a number n which added to its sum of digits gives 29931986.

It is not an unprimeable number, because it can be changed into a prime (29931989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1068986 + ... + 1069013.

It is an arithmetic number, because the mean of its divisors is an integer number (6414000).

Almost surely, 2^29931986 is an apocalyptic number.

29931986 is a deficient number, since it is larger than the sum of its proper divisors (21380014).

29931986 is a wasteful number, since it uses less digits than its factorization.

29931986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138008.

The product of its digits is 209952, while the sum is 47.

The square root of 29931986 is about 5471.0132516747. The cubic root of 29931986 is about 310.4882559048.

The spelling of 29931986 in words is "twenty-nine million, nine hundred thirty-one thousand, nine hundred eighty-six".