29981958 has 16 divisors (see below), whose sum is σ = 61240320. Its totient is φ = 9781256.

The previous prime is 29981893. The next prime is 29981977. The reversal of 29981958 is 85918992.

It is a self number, because there is not a number n which added to its sum of digits gives 29981958.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 52878 + ... + 53441.

It is an arithmetic number, because the mean of its divisors is an integer number (3827520).

Almost surely, 2^29981958 is an apocalyptic number.

29981958 is an abundant number, since it is smaller than the sum of its proper divisors (31258362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29981958 is a wasteful number, since it uses less digits than its factorization.

29981958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106371.

The product of its digits is 466560, while the sum is 51.

The square root of 29981958 is about 5475.5783256200. The cubic root of 29981958 is about 310.6609484499.

The spelling of 29981958 in words is "twenty-nine million, nine hundred eighty-one thousand, nine hundred fifty-eight".