29428381 has 6 divisors (see below), whose sum is σ = 29613246. Its totient is φ = 29244600.

The previous prime is 29428367. The next prime is 29428387. The reversal of 29428381 is 18382492.

It can be written as a sum of positive squares in only one way, i.e., 27825625 + 1602756 = 5275^2 + 1266^2 .

It is not a de Polignac number, because 29428381 - 2⁷ = 29428253 is a prime.

It is a super-2 number, since 2×29428381² = 1732059216562322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29428381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29428387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44191 + ... + 44851.

It is an arithmetic number, because the mean of its divisors is an integer number (4935541).

Almost surely, 2^29428381 is an apocalyptic number.

It is an amenable number.

29428381 is a deficient number, since it is larger than the sum of its proper divisors (184865).

29428381 is an frugal number, since it uses more digits than its factorization.

29428381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083 (or 872 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 29428381 is about 5424.7931757810. The cubic root of 29428381 is about 308.7370783601.

The spelling of 29428381 in words is "twenty-nine million, four hundred twenty-eight thousand, three hundred eighty-one".