29800819 has 4 divisors (see below), whose sum is σ = 29840944. Its totient is φ = 29760696.

The previous prime is 29800817. The next prime is 29800831. The reversal of 29800819 is 91800892.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 29800819 - 2¹ = 29800817 is a prime.

It is a super-2 number, since 2×29800819² = 1776177626141522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29800811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18927 + ... + 20440.

It is an arithmetic number, because the mean of its divisors is an integer number (7460236).

Almost surely, 2^29800819 is an apocalyptic number.

29800819 is a deficient number, since it is larger than the sum of its proper divisors (40125).

29800819 is an equidigital number, since it uses as much as digits as its factorization.

29800819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40124.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 29800819 is about 5459.0126396630. The cubic root of 29800819 is about 310.0340545315.

The spelling of 29800819 in words is "twenty-nine million, eight hundred thousand, eight hundred nineteen".