128345742 has 32 divisors (see below), whose sum is σ = 325958400. Its totient is φ = 36670104.

The previous prime is 128345729. The next prime is 128345747. The reversal of 128345742 is 247543821.

It is a happy number.

128345742 is a `hidden beast` number, since 1 + 2 + 83 + 4 + 574 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 128345697 and 128345706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128345747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169392 + ... + 170147.

It is an arithmetic number, because the mean of its divisors is an integer number (10186200).

Almost surely, 2^128345742 is an apocalyptic number.

128345742 is an abundant number, since it is smaller than the sum of its proper divisors (197612658).

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

128345742 is a wasteful number, since it uses less digits than its factorization.

128345742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339557 (or 339551 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 128345742 is about 11328.9779768521. The cubic root of 128345742 is about 504.4217699613.

The spelling of 128345742 in words is "one hundred twenty-eight million, three hundred forty-five thousand, seven hundred forty-two".