128200634 has 16 divisors (see below), whose sum is σ = 197852928. Its totient is φ = 62255952.

The previous prime is 128200609. The next prime is 128200637. The reversal of 128200634 is 436002821.

It is not an unprimeable number, because it can be changed into a prime (128200637) 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, 52607 + ... + 54989.

It is an arithmetic number, because the mean of its divisors is an integer number (12365808).

Almost surely, 2^128200634 is an apocalyptic number.

128200634 is a deficient number, since it is larger than the sum of its proper divisors (69652294).

128200634 is a wasteful number, since it uses less digits than its factorization.

128200634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3149.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 128200634 is about 11322.5718809818. The cubic root of 128200634 is about 504.2315981243.

The spelling of 128200634 in words is "one hundred twenty-eight million, two hundred thousand, six hundred thirty-four".