11543428 has 12 divisors (see below), whose sum is σ = 21755020. Its totient is φ = 5327712.

The previous prime is 11543423. The next prime is 11543429. The reversal of 11543428 is 82434511.

It can be written as a sum of positive squares in 2 ways, for example, as 7225344 + 4318084 = 2688^2 + 2078^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11543396 and 11543405.

It is not an unprimeable number, because it can be changed into a prime (11543423) 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, 110943 + ... + 111046.

Almost surely, 2^11543428 is an apocalyptic number.

It is an amenable number.

11543428 is a deficient number, since it is larger than the sum of its proper divisors (10211592).

11543428 is a wasteful number, since it uses less digits than its factorization.

11543428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222006 (or 222004 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 11543428 is about 3397.5620671299. The cubic root of 11543428 is about 226.0016445961.

Adding to 11543428 its reverse (82434511), we get a palindrome (93977939).

The spelling of 11543428 in words is "eleven million, five hundred forty-three thousand, four hundred twenty-eight".