11213428 has 6 divisors (see below), whose sum is σ = 19623506. Its totient is φ = 5606712.

The previous prime is 11213417. The next prime is 11213453. The reversal of 11213428 is 82431211.

It is a happy number.

11213428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11009124 + 204304 = 3318^2 + 452^2 .

It is a super-2 number, since 2×11213428² = 251481935022368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11213399 and 11213408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1401675 + ... + 1401682.

Almost surely, 2^11213428 is an apocalyptic number.

It is an amenable number.

11213428 is a deficient number, since it is larger than the sum of its proper divisors (8410078).

11213428 is a wasteful number, since it uses less digits than its factorization.

11213428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803361 (or 2803359 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 11213428 is about 3348.6456963973. The cubic root of 11213428 is about 223.8271679149.

Adding to 11213428 its reverse (82431211), we get a palindrome (93644639).

The spelling of 11213428 in words is "eleven million, two hundred thirteen thousand, four hundred twenty-eight".