128418672 has 40 divisors (see below), whose sum is σ = 335045520. Its totient is φ = 42380800.

The previous prime is 128418613. The next prime is 128418691. The reversal of 128418672 is 276814821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 128418672.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8397 + ... + 18092.

It is an arithmetic number, because the mean of its divisors is an integer number (8376138).

Almost surely, 2^128418672 is an apocalyptic number.

128418672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128418672 is an abundant number, since it is smaller than the sum of its proper divisors (206626848).

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

128418672 is a wasteful number, since it uses less digits than its factorization.

128418672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26601 (or 26595 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 128418672 is about 11332.1962566839. The cubic root of 128418672 is about 504.5172945274.

The spelling of 128418672 in words is "one hundred twenty-eight million, four hundred eighteen thousand, six hundred seventy-two".