18028425 has 12 divisors (see below), whose sum is σ = 29807120. Its totient is φ = 9615120.

The previous prime is 18028411. The next prime is 18028429. The reversal of 18028425 is 52482081.

It is not a de Polignac number, because 18028425 - 2¹² = 18024329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18028392 and 18028401.

It is not an unprimeable number, because it can be changed into a prime (18028429) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 120115 + ... + 120264.

Almost surely, 2^18028425 is an apocalyptic number.

18028425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18028425 is a deficient number, since it is larger than the sum of its proper divisors (11778695).

18028425 is a wasteful number, since it uses less digits than its factorization.

18028425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240392 (or 240387 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 18028425 is about 4245.9892840185. The cubic root of 18028425 is about 262.2120197827.

The spelling of 18028425 in words is "eighteen million, twenty-eight thousand, four hundred twenty-five".