29128641 has 16 divisors (see below), whose sum is σ = 39844224. Its totient is φ = 18921344.

The previous prime is 29128621. The next prime is 29128651. The reversal of 29128641 is 14682192.

It is a cyclic number.

It is not a de Polignac number, because 29128641 - 2⁷ = 29128513 is a prime.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26005 + ... + 27101.

It is an arithmetic number, because the mean of its divisors is an integer number (2490264).

Almost surely, 2^29128641 is an apocalyptic number.

It is an amenable number.

29128641 is a deficient number, since it is larger than the sum of its proper divisors (10715583).

29128641 is a wasteful number, since it uses less digits than its factorization.

29128641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320.

The product of its digits is 6912, while the sum is 33.

The square root of 29128641 is about 5397.0956078246. The cubic root of 29128641 is about 307.6852951559.

The spelling of 29128641 in words is "twenty-nine million, one hundred twenty-eight thousand, six hundred forty-one".