128445707 has 8 divisors (see below), whose sum is σ = 138662160. Its totient is φ = 118277280.

The previous prime is 128445703. The next prime is 128445797. The reversal of 128445707 is 707544821.

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

It is a cyclic number.

It is not a de Polignac number, because 128445707 - 2² = 128445703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128445701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6344 + ... + 17237.

It is an arithmetic number, because the mean of its divisors is an integer number (17332770).

Almost surely, 2^128445707 is an apocalyptic number.

128445707 is a deficient number, since it is larger than the sum of its proper divisors (10216453).

128445707 is a wasteful number, since it uses less digits than its factorization.

128445707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24013.

The product of its (nonzero) digits is 62720, while the sum is 38.

The square root of 128445707 is about 11333.3890341768. The cubic root of 128445707 is about 504.5526960979.

The spelling of 128445707 in words is "one hundred twenty-eight million, four hundred forty-five thousand, seven hundred seven".