11605428 has 72 divisors (see below), whose sum is σ = 31624320. Its totient is φ = 3586896.

The previous prime is 11605427. The next prime is 11605453. The reversal of 11605428 is 82450611.

11605428 is a `hidden beast` number, since 11 + 605 + 42 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11605427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246901 + ... + 246947.

Almost surely, 2^11605428 is an apocalyptic number.

11605428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11605428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15812160).

11605428 is an abundant number, since it is smaller than the sum of its proper divisors (20018892).

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

11605428 is a wasteful number, since it uses less digits than its factorization.

11605428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 11605428 is about 3406.6740378263. The cubic root of 11605428 is about 226.4055422401.

The spelling of 11605428 in words is "eleven million, six hundred five thousand, four hundred twenty-eight".