128650742 has 8 divisors (see below), whose sum is σ = 210519432. Its totient is φ = 58477600.

The previous prime is 128650721. The next prime is 128650759. The reversal of 128650742 is 247056821.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 2923859 + ... + 2923902.

It is an arithmetic number, because the mean of its divisors is an integer number (26314929).

Almost surely, 2^128650742 is an apocalyptic number.

128650742 is a deficient number, since it is larger than the sum of its proper divisors (81868690).

128650742 is a wasteful number, since it uses less digits than its factorization.

128650742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5847774.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 128650742 is about 11342.4310445336. The cubic root of 128650742 is about 504.8210220901.

The spelling of 128650742 in words is "one hundred twenty-eight million, six hundred fifty thousand, seven hundred forty-two".