29281320 has 96 divisors (see below), whose sum is σ = 95940000. Its totient is φ = 7744896.

The previous prime is 29281313. The next prime is 29281333. The reversal of 29281320 is 2318292.

It is a happy 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 23 ways as a sum of consecutive naturals, for example, 58431 + ... + 58929.

It is an arithmetic number, because the mean of its divisors is an integer number (999375).

Almost surely, 2^29281320 is an apocalyptic number.

29281320 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 29281320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47970000).

29281320 is an abundant number, since it is smaller than the sum of its proper divisors (66658680).

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

29281320 is a wasteful number, since it uses less digits than its factorization.

29281320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 29281320 is about 5411.2216735225. The cubic root of 29281320 is about 308.2219404449.

The spelling of 29281320 in words is "twenty-nine million, two hundred eighty-one thousand, three hundred twenty".