128385426 has 16 divisors (see below), whose sum is σ = 276522624. Its totient is φ = 39503184.

The previous prime is 128385421. The next prime is 128385427. The reversal of 128385426 is 624583821.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128385421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 822906 + ... + 823061.

It is an arithmetic number, because the mean of its divisors is an integer number (17282664).

Almost surely, 2^128385426 is an apocalyptic number.

128385426 is an abundant number, since it is smaller than the sum of its proper divisors (148137198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128385426 is a wasteful number, since it uses less digits than its factorization.

128385426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645985.

The product of its digits is 92160, while the sum is 39.

The square root of 128385426 is about 11330.7292792653. The cubic root of 128385426 is about 504.4737530149.

The spelling of 128385426 in words is "one hundred twenty-eight million, three hundred eighty-five thousand, four hundred twenty-six".