11405428 has 12 divisors (see below), whose sum is σ = 20021092. Its totient is φ = 5685120.

The previous prime is 11405423. The next prime is 11405431. The reversal of 11405428 is 82450411.

It can be written as a sum of positive squares in 2 ways, for example, as 6441444 + 4963984 = 2538^2 + 2228^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11405423) 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, 2883 + ... + 5578.

Almost surely, 2^11405428 is an apocalyptic number.

It is an amenable number.

11405428 is a deficient number, since it is larger than the sum of its proper divisors (8615664).

11405428 is a wasteful number, since it uses less digits than its factorization.

11405428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8802 (or 8800 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 11405428 is about 3377.1923249942. The cubic root of 11405428 is about 225.0974261207.

Adding to 11405428 its reverse (82450411), we get a palindrome (93855839).

The spelling of 11405428 in words is "eleven million, four hundred five thousand, four hundred twenty-eight".