128697234 has 8 divisors (see below), whose sum is σ = 257394480. Its totient is φ = 42899076.

The previous prime is 128697229. The next prime is 128697253. The reversal of 128697234 is 432796821.

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

128697234 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10724764 + ... + 10724775.

It is an arithmetic number, because the mean of its divisors is an integer number (32174310).

Almost surely, 2^128697234 is an apocalyptic number.

128697234 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128697234 is a wasteful number, since it uses less digits than its factorization.

128697234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21449544.

The product of its digits is 145152, while the sum is 42.

The square root of 128697234 is about 11344.4803318618. The cubic root of 128697234 is about 504.8818257615.

The spelling of 128697234 in words is "one hundred twenty-eight million, six hundred ninety-seven thousand, two hundred thirty-four".