128764486 has 16 divisors (see below), whose sum is σ = 197149680. Its totient is φ = 63059040.

The previous prime is 128764469. The next prime is 128764487. The reversal of 128764486 is 684467821.

It is a super-4 number, since 4×128764486⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128764487) 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, 21600 + ... + 26908.

It is an arithmetic number, because the mean of its divisors is an integer number (12321855).

Almost surely, 2^128764486 is an apocalyptic number.

128764486 is a deficient number, since it is larger than the sum of its proper divisors (68385194).

128764486 is a wasteful number, since it uses less digits than its factorization.

128764486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5559.

The product of its digits is 516096, while the sum is 46.

The square root of 128764486 is about 11347.4440293839. Note that the first 3 decimals coincide. The cubic root of 128764486 is about 504.9697540948.

The spelling of 128764486 in words is "one hundred twenty-eight million, seven hundred sixty-four thousand, four hundred eighty-six".