29999956 has 36 divisors (see below), whose sum is σ = 61406100. Its totient is φ = 12786816.

The previous prime is 29999947. The next prime is 29999989. The reversal of 29999956 is 65999992.

It can be written as a sum of positive squares in 2 ways, for example, as 3312400 + 26687556 = 1820^2 + 5166^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 29999956.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52440 + ... + 53008.

It is an arithmetic number, because the mean of its divisors is an integer number (1705725).

Almost surely, 2^29999956 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 29999956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30703050).

29999956 is an abundant number, since it is smaller than the sum of its proper divisors (31406144).

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

29999956 is a wasteful number, since it uses less digits than its factorization.

29999956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856 (or 847 counting only the distinct ones).

The product of its digits is 3542940, while the sum is 58.

The square root of 29999956 is about 5477.2215584181. The cubic root of 29999956 is about 310.7230986862.

The spelling of 29999956 in words is "twenty-nine million, nine hundred ninety-nine thousand, nine hundred fifty-six".