29922381 has 24 divisors (see below), whose sum is σ = 45171360. Its totient is φ = 19067616.

The previous prime is 29922341. The next prime is 29922383. The reversal of 29922381 is 18322992.

It is not a de Polignac number, because 29922381 - 2⁶ = 29922317 is a prime.

It is a super-2 number, since 2×29922381² = 1790697769418322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29922383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18886 + ... + 20408.

It is an arithmetic number, because the mean of its divisors is an integer number (1882140).

Almost surely, 2^29922381 is an apocalyptic number.

It is an amenable number.

29922381 is a deficient number, since it is larger than the sum of its proper divisors (15248979).

29922381 is a wasteful number, since it uses less digits than its factorization.

29922381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625 (or 1622 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 29922381 is about 5470.1353730964. The cubic root of 29922381 is about 310.4550410606.

It can be divided in two parts, 29922 and 381, that added together give a palindrome (30303).

The spelling of 29922381 in words is "twenty-nine million, nine hundred twenty-two thousand, three hundred eighty-one".