18812428 has 24 divisors (see below), whose sum is σ = 34260800. Its totient is φ = 9030528.

The previous prime is 18812411. The next prime is 18812441. The reversal of 18812428 is 82421881.

It is a junction number, because it is equal to n+sod(n) for n = 18812393 and 18812402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10888 + ... + 12496.

Almost surely, 2^18812428 is an apocalyptic number.

It is an amenable number.

18812428 is a deficient number, since it is larger than the sum of its proper divisors (15448372).

18812428 is a wasteful number, since it uses less digits than its factorization.

18812428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729 (or 1727 counting only the distinct ones).

The product of its digits is 8192, while the sum is 34.

The square root of 18812428 is about 4337.3295931944. The cubic root of 18812428 is about 265.9591585589.

The spelling of 18812428 in words is "eighteen million, eight hundred twelve thousand, four hundred twenty-eight".