18828442 has 8 divisors (see below), whose sum is σ = 28502100. Its totient is φ = 9327744.

The previous prime is 18828437. The next prime is 18828451. The reversal of 18828442 is 24482881.

It can be written as a sum of positive squares in 2 ways, for example, as 18826921 + 1521 = 4339^2 + 39^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 42967 + ... + 43402.

Almost surely, 2^18828442 is an apocalyptic number.

18828442 is a deficient number, since it is larger than the sum of its proper divisors (9673658).

18828442 is a wasteful number, since it uses less digits than its factorization.

18828442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86480.

The product of its digits is 32768, while the sum is 37.

The square root of 18828442 is about 4339.1752672599. The cubic root of 18828442 is about 266.0346026932.

The spelling of 18828442 in words is "eighteen million, eight hundred twenty-eight thousand, four hundred forty-two".