128850506 has 8 divisors (see below), whose sum is σ = 193352484. Its totient is φ = 64399680.

The previous prime is 128850503. The next prime is 128850529. The reversal of 128850506 is 605058821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 117527281 + 11323225 = 10841^2 + 3365^2 .

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

It is not an unprimeable number, because it can be changed into a prime (128850503) 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, 5705 + ... + 17036.

Almost surely, 2^128850506 is an apocalyptic number.

128850506 is a deficient number, since it is larger than the sum of its proper divisors (64501978).

128850506 is a wasteful number, since it uses less digits than its factorization.

128850506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25576.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 128850506 is about 11351.2336774467. The cubic root of 128850506 is about 505.0821759551.

The spelling of 128850506 in words is "one hundred twenty-eight million, eight hundred fifty thousand, five hundred six".