128703864 has 32 divisors (see below), whose sum is σ = 323568000. Its totient is φ = 42660192.

The previous prime is 128703863. The next prime is 128703893. The reversal of 128703864 is 468307821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128703863) 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, 10684 + ... + 19275.

It is an arithmetic number, because the mean of its divisors is an integer number (10111500).

Almost surely, 2^128703864 is an apocalyptic number.

It is an amenable number.

128703864 is an abundant number, since it is smaller than the sum of its proper divisors (194864136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128703864 is a wasteful number, since it uses less digits than its factorization.

128703864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30147 (or 30143 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 128703864 is about 11344.7725406903. The cubic root of 128703864 is about 504.8904954868.

The spelling of 128703864 in words is "one hundred twenty-eight million, seven hundred three thousand, eight hundred sixty-four".