29912520 has 256 divisors, whose sum is σ = 109486080. Its totient is φ = 6451200.

The previous prime is 29912507. The next prime is 29912527. The reversal of 29912520 is 2521992.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29912527) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 695619 + ... + 695661.

It is an arithmetic number, because the mean of its divisors is an integer number (427680).

Almost surely, 2^29912520 is an apocalyptic number.

29912520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29912520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54743040).

29912520 is an abundant number, since it is smaller than the sum of its proper divisors (79573560).

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

29912520 is a wasteful number, since it uses less digits than its factorization.

29912520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 29912520 is about 5469.2339500153. The cubic root of 29912520 is about 310.4209335529.

The spelling of 29912520 in words is "twenty-nine million, nine hundred twelve thousand, five hundred twenty".