29681390 has 8 divisors (see below), whose sum is σ = 53426520. Its totient is φ = 11872552.

The previous prime is 29681389. The next prime is 29681419. The reversal of 29681390 is 9318692.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1484060 + ... + 1484079.

It is an arithmetic number, because the mean of its divisors is an integer number (6678315).

Almost surely, 2^29681390 is an apocalyptic number.

29681390 is a deficient number, since it is larger than the sum of its proper divisors (23745130).

29681390 is a wasteful number, since it uses less digits than its factorization.

29681390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2968146.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 29681390 is about 5448.0629585202. The cubic root of 29681390 is about 309.6193385197.

The spelling of 29681390 in words is "twenty-nine million, six hundred eighty-one thousand, three hundred ninety".