128330406 has 20 divisors (see below), whose sum is σ = 287555532. Its totient is φ = 42776748.

The previous prime is 128330381. The next prime is 128330407. The reversal of 128330406 is 604033821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128330406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128330407) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 395920 + ... + 396243.

Almost surely, 2^128330406 is an apocalyptic number.

128330406 is an abundant number, since it is smaller than the sum of its proper divisors (159225126).

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

128330406 is an equidigital number, since it uses as much as digits as its factorization.

128330406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792177 (or 792168 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 128330406 is about 11328.3011082863. The cubic root of 128330406 is about 504.4016780847.

The spelling of 128330406 in words is "one hundred twenty-eight million, three hundred thirty thousand, four hundred six".