29899872 has 144 divisors (see below), whose sum is σ = 93405312. Its totient is φ = 9031680.

The previous prime is 29899871. The next prime is 29899879. The reversal of 29899872 is 27899892.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29899871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151678 + ... + 151874.

It is an arithmetic number, because the mean of its divisors is an integer number (648648).

Almost surely, 2^29899872 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 29899872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46702656).

29899872 is an abundant number, since it is smaller than the sum of its proper divisors (63505440).

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

29899872 is a wasteful number, since it uses less digits than its factorization.

29899872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 250 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 29899872 is about 5468.0775415131. The cubic root of 29899872 is about 310.3771753153.

The spelling of 29899872 in words is "twenty-nine million, eight hundred ninety-nine thousand, eight hundred seventy-two".