11831428 has 12 divisors (see below), whose sum is σ = 23662912. Its totient is φ = 5070600.

The previous prime is 11831423. The next prime is 11831437. The reversal of 11831428 is 82413811.

11831428 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 422551 = 11831428 / (1 + 1 + 8 + 3 + 1 + 4 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 11831396 and 11831405.

It is not an unprimeable number, because it can be changed into a prime (11831423) 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, 211248 + ... + 211303.

Almost surely, 2^11831428 is an apocalyptic number.

It is an amenable number.

11831428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11831428 is a wasteful number, since it uses less digits than its factorization.

11831428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422562 (or 422560 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 11831428 is about 3439.6842878381. The cubic root of 11831428 is about 227.8657514807.

The spelling of 11831428 in words is "eleven million, eight hundred thirty-one thousand, four hundred twenty-eight".