2405128 has 32 divisors (see below), whose sum is σ = 4979520. Its totient is φ = 1080000.

The previous prime is 2405107. The next prime is 2405141. The reversal of 2405128 is 8215042.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 2405099 and 2405108.

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, 13198 + ... + 13378.

It is an arithmetic number, because the mean of its divisors is an integer number (155610).

2^2405128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2405128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2489760).

2405128 is an abundant number, since it is smaller than the sum of its proper divisors (2574392).

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

2405128 is a wasteful number, since it uses less digits than its factorization.

2405128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2405128 is about 1550.8475102343. The cubic root of 2405128 is about 133.9818791862.

The spelling of 2405128 in words is "two million, four hundred five thousand, one hundred twenty-eight".