11538428 has 12 divisors (see below), whose sum is σ = 22027992. Its totient is φ = 5244720.

The previous prime is 11538421. The next prime is 11538437. The reversal of 11538428 is 82483511.

It is a super-2 number, since 2×11538428² = 266270641422368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11538394 and 11538403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11538421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131075 + ... + 131162.

It is an arithmetic number, because the mean of its divisors is an integer number (1835666).

Almost surely, 2^11538428 is an apocalyptic number.

It is an amenable number.

11538428 is a deficient number, since it is larger than the sum of its proper divisors (10489564).

11538428 is a wasteful number, since it uses less digits than its factorization.

11538428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262252 (or 262250 counting only the distinct ones).

The product of its digits is 7680, while the sum is 32.

The square root of 11538428 is about 3396.8261657023. The cubic root of 11538428 is about 225.9690092467.

The spelling of 11538428 in words is "eleven million, five hundred thirty-eight thousand, four hundred twenty-eight".