128442942 has 32 divisors (see below), whose sum is σ = 290115360. Its totient is φ = 42111360.

The previous prime is 128442929. The next prime is 128442949. The reversal of 128442942 is 249244821.

128442942 is a `hidden beast` number, since 128 + 442 + 94 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 128442897 and 128442906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128442949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16203 + ... + 22790.

It is an arithmetic number, because the mean of its divisors is an integer number (9066105).

Almost surely, 2^128442942 is an apocalyptic number.

128442942 is an abundant number, since it is smaller than the sum of its proper divisors (161672418).

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

128442942 is a wasteful number, since it uses less digits than its factorization.

128442942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39065 (or 39059 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 128442942 is about 11333.2670488258. The cubic root of 128442942 is about 504.5490756364.

The spelling of 128442942 in words is "one hundred twenty-eight million, four hundred forty-two thousand, nine hundred forty-two".