128579942 has 16 divisors (see below), whose sum is σ = 205476912. Its totient is φ = 60134400.

The previous prime is 128579923. The next prime is 128579951. The reversal of 128579942 is 249975821.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6059 + ... + 17142.

It is an arithmetic number, because the mean of its divisors is an integer number (12842307).

Almost surely, 2^128579942 is an apocalyptic number.

128579942 is a deficient number, since it is larger than the sum of its proper divisors (76896970).

128579942 is a wasteful number, since it uses less digits than its factorization.

128579942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23383.

The product of its digits is 362880, while the sum is 47.

The square root of 128579942 is about 11339.3095909760. The cubic root of 128579942 is about 504.7283995207.

The spelling of 128579942 in words is "one hundred twenty-eight million, five hundred seventy-nine thousand, nine hundred forty-two".