128387874 has 16 divisors (see below), whose sum is σ = 260294112. Its totient is φ = 42209568.

The previous prime is 128387873. The next prime is 128387899. The reversal of 128387874 is 478783821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (128387873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146124 + ... + 146999.

It is an arithmetic number, because the mean of its divisors is an integer number (16268382).

Almost surely, 2^128387874 is an apocalyptic number.

128387874 is an abundant number, since it is smaller than the sum of its proper divisors (131906238).

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

128387874 is a wasteful number, since it uses less digits than its factorization.

128387874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293201.

The product of its digits is 602112, while the sum is 48.

The square root of 128387874 is about 11330.8373035712. The cubic root of 128387874 is about 504.4769593599.

The spelling of 128387874 in words is "one hundred twenty-eight million, three hundred eighty-seven thousand, eight hundred seventy-four".