18288490 has 16 divisors (see below), whose sum is σ = 35912160. Its totient is φ = 6650320.

The previous prime is 18288467. The next prime is 18288493. The reversal of 18288490 is 9488281.

It is not an unprimeable number, because it can be changed into a prime (18288493) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 83020 + ... + 83239.

It is an arithmetic number, because the mean of its divisors is an integer number (2244510).

Almost surely, 2^18288490 is an apocalyptic number.

18288490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18288490 is a deficient number, since it is larger than the sum of its proper divisors (17623670).

18288490 is a wasteful number, since it uses less digits than its factorization.

18288490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166277.

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 18288490 is about 4276.5044136537. The cubic root of 18288490 is about 263.4668322017.

The spelling of 18288490 in words is "eighteen million, two hundred eighty-eight thousand, four hundred ninety".