128187734 has 8 divisors (see below), whose sum is σ = 192621240. Its totient is φ = 63980656.

The previous prime is 128187713. The next prime is 128187739. The reversal of 128187734 is 437781821.

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

It is a junction number, because it is equal to n+sod(n) for n = 128187691 and 128187700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128187739) 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, 55184 + ... + 57459.

It is an arithmetic number, because the mean of its divisors is an integer number (24077655).

Almost surely, 2^128187734 is an apocalyptic number.

128187734 is a deficient number, since it is larger than the sum of its proper divisors (64433506).

128187734 is a wasteful number, since it uses less digits than its factorization.

128187734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113214.

The product of its digits is 75264, while the sum is 41.

The square root of 128187734 is about 11322.0022080902. The cubic root of 128187734 is about 504.2146850363.

The spelling of 128187734 in words is "one hundred twenty-eight million, one hundred eighty-seven thousand, seven hundred thirty-four".