18285290 has 16 divisors (see below), whose sum is σ = 32963112. Its totient is φ = 7303104.

The previous prime is 18285287. The next prime is 18285301. The reversal of 18285290 is 9258281.

It can be written as a sum of positive squares in 4 ways, for example, as 4439449 + 13845841 = 2107^2 + 3721^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18285290.

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, 10352 + ... + 11988.

Almost surely, 2^18285290 is an apocalyptic number.

18285290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18285290 is a deficient number, since it is larger than the sum of its proper divisors (14677822).

18285290 is a wasteful number, since it uses less digits than its factorization.

18285290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 18285290 is about 4276.1302599430. The cubic root of 18285290 is about 263.4514647394.

The spelling of 18285290 in words is "eighteen million, two hundred eighty-five thousand, two hundred ninety".