128204456 has 32 divisors (see below), whose sum is σ = 247937760. Its totient is φ = 62117952.

The previous prime is 128204449. The next prime is 128204459. The reversal of 128204456 is 654402821.

It is not an unprimeable number, because it can be changed into a prime (128204459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33371 + ... + 37013.

It is an arithmetic number, because the mean of its divisors is an integer number (7748055).

Almost surely, 2^128204456 is an apocalyptic number.

It is an amenable number.

128204456 is a deficient number, since it is larger than the sum of its proper divisors (119733304).

128204456 is a wasteful number, since it uses less digits than its factorization.

128204456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3785 (or 3781 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 128204456 is about 11322.7406576323. The cubic root of 128204456 is about 504.2366089003.

The spelling of 128204456 in words is "one hundred twenty-eight million, two hundred four thousand, four hundred fifty-six".