29681378 has 8 divisors (see below), whose sum is σ = 45362268. Its totient is φ = 14560624.

The previous prime is 29681359. The next prime is 29681383. The reversal of 29681378 is 87318692.

It can be written as a sum of positive squares in 2 ways, for example, as 29560969 + 120409 = 5437^2 + 347^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 139901 + ... + 140112.

Almost surely, 2^29681378 is an apocalyptic number.

29681378 is a deficient number, since it is larger than the sum of its proper divisors (15680890).

29681378 is a wasteful number, since it uses less digits than its factorization.

29681378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280068.

The product of its digits is 145152, while the sum is 44.

The square root of 29681378 is about 5448.0618572112. The cubic root of 29681378 is about 309.6192967939.

The spelling of 29681378 in words is "twenty-nine million, six hundred eighty-one thousand, three hundred seventy-eight".