406128 has 20 divisors (see below), whose sum is σ = 1049288. Its totient is φ = 135360.

The previous prime is 406123. The next prime is 406169. The reversal of 406128 is 821604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406123) by changing a digit.

406128 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4183 + ... + 4278.

2⁴⁰⁶¹²⁸ is an apocalyptic number.

406128 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

406128 is an abundant number, since it is smaller than the sum of its proper divisors (643160).

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

406128 is a wasteful number, since it uses less digits than its factorization.

406128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8472 (or 8466 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 406128 is about 637.2817273389. The cubic root of 406128 is about 74.0549871316.

The spelling of 406128 in words is "four hundred six thousand, one hundred twenty-eight".