11405128 has 16 divisors (see below), whose sum is σ = 24439680. Its totient is φ = 4887888.

The previous prime is 11405101. The next prime is 11405129. The reversal of 11405128 is 82150411.

It is a super-3 number, since 3×11405128³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11405099 and 11405108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11405129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101776 + ... + 101887.

It is an arithmetic number, because the mean of its divisors is an integer number (1527480).

Almost surely, 2^11405128 is an apocalyptic number.

It is an amenable number.

11405128 is an abundant number, since it is smaller than the sum of its proper divisors (13034552).

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

11405128 is a wasteful number, since it uses less digits than its factorization.

11405128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203676 (or 203672 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 11405128 is about 3377.1479091091. The cubic root of 11405128 is about 225.0954525043.

Adding to 11405128 its reverse (82150411), we get a palindrome (93555539).

The spelling of 11405128 in words is "eleven million, four hundred five thousand, one hundred twenty-eight".