128040429 has 16 divisors (see below), whose sum is σ = 186439680. Its totient is φ = 77517360.

The previous prime is 128040401. The next prime is 128040431. The reversal of 128040429 is 924040821.

It is not a de Polignac number, because 128040429 - 2¹⁵ = 128007661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128040396 and 128040405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128040529) 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, 45732 + ... + 48450.

It is an arithmetic number, because the mean of its divisors is an integer number (11652480).

Almost surely, 2^128040429 is an apocalyptic number.

It is an amenable number.

128040429 is a deficient number, since it is larger than the sum of its proper divisors (58399251).

128040429 is a wasteful number, since it uses less digits than its factorization.

128040429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4160.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 128040429 is about 11315.4950841755. The cubic root of 128040429 is about 504.0214741102.

The spelling of 128040429 in words is "one hundred twenty-eight million, forty thousand, four hundred twenty-nine".