128040629 has 8 divisors (see below), whose sum is σ = 129548160. Its totient is φ = 126538000.

The previous prime is 128040623. The next prime is 128040631. The reversal of 128040629 is 926040821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128040629 - 2¹² = 128036533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128040595 and 128040604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128040623) 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 7 ways as a sum of consecutive naturals, for example, 83984 + ... + 85494.

It is an arithmetic number, because the mean of its divisors is an integer number (16193520).

Almost surely, 2^128040629 is an apocalyptic number.

It is an amenable number.

128040629 is a deficient number, since it is larger than the sum of its proper divisors (1507531).

128040629 is a wasteful number, since it uses less digits than its factorization.

128040629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2451.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 128040629 is about 11315.5039216113. The cubic root of 128040629 is about 504.0217365384.

The spelling of 128040629 in words is "one hundred twenty-eight million, forty thousand, six hundred twenty-nine".