29280380 has 48 divisors (see below), whose sum is σ = 65427264. Its totient is φ = 10982400.

The previous prime is 29280379. The next prime is 29280397. The reversal of 29280380 is 8308292.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23780 + ... + 24980.

It is an arithmetic number, because the mean of its divisors is an integer number (1363068).

Almost surely, 2^29280380 is an apocalyptic number.

29280380 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 29280380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32713632).

29280380 is an abundant number, since it is smaller than the sum of its proper divisors (36146884).

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

29280380 is a wasteful number, since it uses less digits than its factorization.

29280380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 29280380 is about 5411.1348162839. The cubic root of 29280380 is about 308.2186421905.

The spelling of 29280380 in words is "twenty-nine million, two hundred eighty thousand, three hundred eighty".