29928813 has 8 divisors (see below), whose sum is σ = 40292928. Its totient is φ = 19758624.

The previous prime is 29928809. The next prime is 29928839. The reversal of 29928813 is 31882992.

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

It is not a de Polignac number, because 29928813 - 2² = 29928809 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29928803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48120 + ... + 48737.

It is an arithmetic number, because the mean of its divisors is an integer number (5036616).

Almost surely, 2^29928813 is an apocalyptic number.

It is an amenable number.

29928813 is a deficient number, since it is larger than the sum of its proper divisors (10364115).

29928813 is a wasteful number, since it uses less digits than its factorization.

29928813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96963.

The product of its digits is 62208, while the sum is 42.

The square root of 29928813 is about 5470.7232611420. The cubic root of 29928813 is about 310.4772842077.

The spelling of 29928813 in words is "twenty-nine million, nine hundred twenty-eight thousand, eight hundred thirteen".