128616205 has 16 divisors (see below), whose sum is σ = 158298624. Its totient is φ = 100272640.

The previous prime is 128616167. The next prime is 128616209. The reversal of 128616205 is 502616821.

It is not a de Polignac number, because 128616205 - 2⁷ = 128616077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128616209) 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, 60765 + ... + 62845.

It is an arithmetic number, because the mean of its divisors is an integer number (9893664).

Almost surely, 2^128616205 is an apocalyptic number.

It is an amenable number.

128616205 is a deficient number, since it is larger than the sum of its proper divisors (29682419).

128616205 is a wasteful number, since it uses less digits than its factorization.

128616205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 128616205 is about 11340.9084733102. The cubic root of 128616205 is about 504.7758440529.

It can be divided in two parts, 128616 and 205, that added together give a palindrome (128821).

The spelling of 128616205 in words is "one hundred twenty-eight million, six hundred sixteen thousand, two hundred five".