128445622 has 4 divisors (see below), whose sum is σ = 192668436. Its totient is φ = 64222810.

The previous prime is 128445619. The next prime is 128445623. The reversal of 128445622 is 226544821.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128445623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32111404 + ... + 32111407.

It is an arithmetic number, because the mean of its divisors is an integer number (48167109).

Almost surely, 2^128445622 is an apocalyptic number.

128445622 is a deficient number, since it is larger than the sum of its proper divisors (64222814).

128445622 is an equidigital number, since it uses as much as digits as its factorization.

128445622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64222813.

The product of its digits is 30720, while the sum is 34.

The square root of 128445622 is about 11333.3852841947. The cubic root of 128445622 is about 504.5525848006.

The spelling of 128445622 in words is "one hundred twenty-eight million, four hundred forty-five thousand, six hundred twenty-two".