128416405 has 16 divisors (see below), whose sum is σ = 166239360. Its totient is φ = 94667328.

The previous prime is 128416363. The next prime is 128416411. The reversal of 128416405 is 504614821.

It is a cyclic number.

It is not a de Polignac number, because 128416405 - 2⁹ = 128415893 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 46966 + ... + 49624.

It is an arithmetic number, because the mean of its divisors is an integer number (10389960).

Almost surely, 2^128416405 is an apocalyptic number.

It is an amenable number.

128416405 is a deficient number, since it is larger than the sum of its proper divisors (37822955).

128416405 is a wasteful number, since it uses less digits than its factorization.

128416405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 128416405 is about 11332.0962315010. The cubic root of 128416405 is about 504.5143257290.

It can be divided in two parts, 128416 and 405, that added together give a palindrome (128821).

The spelling of 128416405 in words is "one hundred twenty-eight million, four hundred sixteen thousand, four hundred five".