29880831 has 4 divisors (see below), whose sum is σ = 39841112. Its totient is φ = 19920552.

The previous prime is 29880827. The next prime is 29880857. The reversal of 29880831 is 13808892.

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

It is not a de Polignac number, because 29880831 - 2² = 29880827 is a prime.

It is a super-2 number, since 2×29880831² = 1785728122501122, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 29880831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29880811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4980136 + ... + 4980141.

It is an arithmetic number, because the mean of its divisors is an integer number (9960278).

Almost surely, 2^29880831 is an apocalyptic number.

29880831 is a deficient number, since it is larger than the sum of its proper divisors (9960281).

29880831 is an equidigital number, since it uses as much as digits as its factorization.

29880831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9960280.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 29880831 is about 5466.3361587081. The cubic root of 29880831 is about 310.3112759612.

The spelling of 29880831 in words is "twenty-nine million, eight hundred eighty thousand, eight hundred thirty-one".