29871996 has 72 divisors (see below), whose sum is σ = 87588480. Its totient is φ = 7756320.

The previous prime is 29871991. The next prime is 29871997. The reversal of 29871996 is 69917892.

It is a happy number.

It is a super-2 number, since 2×29871996² = 1784672290048032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29871991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8695 + ... + 11633.

Almost surely, 2^29871996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29871996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43794240).

29871996 is an abundant number, since it is smaller than the sum of its proper divisors (57716484).

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

29871996 is a wasteful number, since it uses less digits than its factorization.

29871996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2975 (or 2962 counting only the distinct ones).

The product of its digits is 489888, while the sum is 51.

The square root of 29871996 is about 5465.5279708369. The cubic root of 29871996 is about 310.2806892351.

The spelling of 29871996 in words is "twenty-nine million, eight hundred seventy-one thousand, nine hundred ninety-six".