29923138 has 64 divisors (see below), whose sum is σ = 57968640. Its totient is φ = 11290752.

The previous prime is 29923133. The next prime is 29923139. The reversal of 29923138 is 83132992.

It is a junction number, because it is equal to n+sod(n) for n = 29923097 and 29923106.

It is not an unprimeable number, because it can be changed into a prime (29923133) 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 31 ways as a sum of consecutive naturals, for example, 409870 + ... + 409942.

It is an arithmetic number, because the mean of its divisors is an integer number (905760).

Almost surely, 2^29923138 is an apocalyptic number.

29923138 is a deficient number, since it is larger than the sum of its proper divisors (28045502).

29923138 is a wasteful number, since it uses less digits than its factorization.

29923138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191.

The product of its digits is 23328, while the sum is 37.

The square root of 29923138 is about 5470.2045665587. The cubic root of 29923138 is about 310.4576590841.

The spelling of 29923138 in words is "twenty-nine million, nine hundred twenty-three thousand, one hundred thirty-eight".