18428026 has 8 divisors (see below), whose sum is σ = 27785844. Its totient is φ = 9166080.

The previous prime is 18428009. The next prime is 18428057. The reversal of 18428026 is 62082481.

It can be written as a sum of positive squares in 2 ways, for example, as 13801225 + 4626801 = 3715^2 + 2151^2 .

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23485 + ... + 24256.

Almost surely, 2^18428026 is an apocalyptic number.

18428026 is a deficient number, since it is larger than the sum of its proper divisors (9357818).

18428026 is a wasteful number, since it uses less digits than its factorization.

18428026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47936.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 18428026 is about 4292.7876723640. The cubic root of 18428026 is about 264.1351943762.

The spelling of 18428026 in words is "eighteen million, four hundred twenty-eight thousand, twenty-six".