128444722 has 8 divisors (see below), whose sum is σ = 220190976. Its totient is φ = 55047732.

The previous prime is 128444689. The next prime is 128444747. The reversal of 128444722 is 227444821.

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, 4587298 + ... + 4587325.

It is an arithmetic number, because the mean of its divisors is an integer number (27523872).

Almost surely, 2^128444722 is an apocalyptic number.

128444722 is a deficient number, since it is larger than the sum of its proper divisors (91746254).

128444722 is an equidigital number, since it uses as much as digits as its factorization.

128444722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9174632.

The product of its digits is 28672, while the sum is 34.

The square root of 128444722 is about 11333.3455784248. The cubic root of 128444722 is about 504.5514063554.

Subtracting 128444722 from its reverse (227444821), we obtain a palindrome (99000099).

The spelling of 128444722 in words is "one hundred twenty-eight million, four hundred forty-four thousand, seven hundred twenty-two".