29802981 has 24 divisors (see below), whose sum is σ = 44534880. Its totient is φ = 17699136.

The previous prime is 29802973. The next prime is 29802991. The reversal of 29802981 is 18920892.

It is not a de Polignac number, because 29802981 - 2³ = 29802973 is a prime.

It is a super-2 number, since 2×29802981² = 1776435352972722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29802961) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 13690 + ... + 15716.

It is an arithmetic number, because the mean of its divisors is an integer number (1855620).

Almost surely, 2^29802981 is an apocalyptic number.

It is an amenable number.

29802981 is a deficient number, since it is larger than the sum of its proper divisors (14731899).

29802981 is a wasteful number, since it uses less digits than its factorization.

29802981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085 (or 2072 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 29802981 is about 5459.2106572288. The cubic root of 29802981 is about 310.0415518357.

The spelling of 29802981 in words is "twenty-nine million, eight hundred two thousand, nine hundred eighty-one".