29781330 has 32 divisors (see below), whose sum is σ = 71941824. Its totient is φ = 7889856.

The previous prime is 29781329. The next prime is 29781377. The reversal of 29781330 is 3318792.

It is a junction number, because it is equal to n+sod(n) for n = 29781291 and 29781300.

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 15 ways as a sum of consecutive naturals, for example, 1549 + ... + 7871.

It is an arithmetic number, because the mean of its divisors is an integer number (2248182).

Almost surely, 2^29781330 is an apocalyptic number.

29781330 is an abundant number, since it is smaller than the sum of its proper divisors (42160494).

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

29781330 is a wasteful number, since it uses less digits than its factorization.

29781330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6490.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 29781330 is about 5457.2273179702. The cubic root of 29781330 is about 309.9664549203.

The spelling of 29781330 in words is "twenty-nine million, seven hundred eighty-one thousand, three hundred thirty".