128380706 has 8 divisors (see below), whose sum is σ = 193187244. Its totient is φ = 63984960.

The previous prime is 128380673. The next prime is 128380711. The reversal of 128380706 is 607083821.

It can be written as a sum of positive squares in 2 ways, for example, as 125641681 + 2739025 = 11209^2 + 1655^2 .

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

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, 101915 + ... + 103166.

Almost surely, 2^128380706 is an apocalyptic number.

128380706 is a deficient number, since it is larger than the sum of its proper divisors (64806538).

128380706 is a wasteful number, since it uses less digits than its factorization.

128380706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205396.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 128380706 is about 11330.5209941997. The cubic root of 128380706 is about 504.4675707314.

The spelling of 128380706 in words is "one hundred twenty-eight million, three hundred eighty thousand, seven hundred six".