128708534 has 8 divisors (see below), whose sum is σ = 193906560. Its totient is φ = 64073016.

The previous prime is 128708521. The next prime is 128708537. The reversal of 128708534 is 435807821.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128708537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140054 + ... + 140969.

It is an arithmetic number, because the mean of its divisors is an integer number (24238320).

Almost surely, 2^128708534 is an apocalyptic number.

128708534 is a deficient number, since it is larger than the sum of its proper divisors (65198026).

128708534 is a wasteful number, since it uses less digits than its factorization.

128708534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281254.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 128708534 is about 11344.9783604906. The cubic root of 128708534 is about 504.8966020377.

The spelling of 128708534 in words is "one hundred twenty-eight million, seven hundred eight thousand, five hundred thirty-four".