29128629 has 4 divisors (see below), whose sum is σ = 38838176. Its totient is φ = 19419084.

The previous prime is 29128621. The next prime is 29128651. The reversal of 29128629 is 92682192.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 29128629 - 2³ = 29128621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29128621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4854769 + ... + 4854774.

It is an arithmetic number, because the mean of its divisors is an integer number (9709544).

Almost surely, 2^29128629 is an apocalyptic number.

It is an amenable number.

29128629 is a deficient number, since it is larger than the sum of its proper divisors (9709547).

29128629 is an equidigital number, since it uses as much as digits as its factorization.

29128629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9709546.

The product of its digits is 31104, while the sum is 39.

The square root of 29128629 is about 5397.0944961155. The cubic root of 29128629 is about 307.6852529040.

It can be divided in two parts, 291 and 28629, that added together give a triangular number (28920 = T₂₄₀).

The spelling of 29128629 in words is "twenty-nine million, one hundred twenty-eight thousand, six hundred twenty-nine".