128663342 has 4 divisors (see below), whose sum is σ = 192995016. Its totient is φ = 64331670.

The previous prime is 128663309. The next prime is 128663347. The reversal of 128663342 is 243366821.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128663347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32165834 + ... + 32165837.

It is an arithmetic number, because the mean of its divisors is an integer number (48248754).

Almost surely, 2^128663342 is an apocalyptic number.

128663342 is a deficient number, since it is larger than the sum of its proper divisors (64331674).

128663342 is an equidigital number, since it uses as much as digits as its factorization.

128663342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64331673.

The product of its digits is 41472, while the sum is 35.

The square root of 128663342 is about 11342.9864674168. The cubic root of 128663342 is about 504.8375022055.

The spelling of 128663342 in words is "one hundred twenty-eight million, six hundred sixty-three thousand, three hundred forty-two".