128628042 has 16 divisors (see below), whose sum is σ = 258001632. Its totient is φ = 42751760.

The previous prime is 128628041. The next prime is 128628053. The reversal of 128628042 is 240826821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 128627994 and 128628012.

It is not an unprimeable number, because it can be changed into a prime (128628041) 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, 28809 + ... + 32972.

It is an arithmetic number, because the mean of its divisors is an integer number (16125102).

Almost surely, 2^128628042 is an apocalyptic number.

128628042 is an abundant number, since it is smaller than the sum of its proper divisors (129373590).

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

128628042 is a wasteful number, since it uses less digits than its factorization.

128628042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62133.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 128628042 is about 11341.4303330753. The cubic root of 128628042 is about 504.7913290077.

The spelling of 128628042 in words is "one hundred twenty-eight million, six hundred twenty-eight thousand, forty-two".