29128085 has 16 divisors (see below), whose sum is σ = 40267776. Its totient is φ = 19813248.

The previous prime is 29128079. The next prime is 29128087. The reversal of 29128085 is 58082192.

It is not a de Polignac number, because 29128085 - 2⁴ = 29128069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29128087) 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, 1169 + ... + 7721.

It is an arithmetic number, because the mean of its divisors is an integer number (2516736).

Almost surely, 2^29128085 is an apocalyptic number.

It is an amenable number.

29128085 is a deficient number, since it is larger than the sum of its proper divisors (11139691).

29128085 is a wasteful number, since it uses less digits than its factorization.

29128085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6692.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 29128085 is about 5397.0440983931. The cubic root of 29128085 is about 307.6833374709.

The spelling of 29128085 in words is "twenty-nine million, one hundred twenty-eight thousand, eighty-five".