18490790 has 8 divisors (see below), whose sum is σ = 33283440. Its totient is φ = 7396312.

The previous prime is 18490789. The next prime is 18490807. The reversal of 18490790 is 9709481.

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

It is a congruent number.

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, 924530 + ... + 924549.

It is an arithmetic number, because the mean of its divisors is an integer number (4160430).

Almost surely, 2^18490790 is an apocalyptic number.

18490790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18490790 is a deficient number, since it is larger than the sum of its proper divisors (14792650).

18490790 is a wasteful number, since it uses less digits than its factorization.

18490790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849086.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 18490790 is about 4300.0918594839. The cubic root of 18490790 is about 264.4347271941.

The spelling of 18490790 in words is "eighteen million, four hundred ninety thousand, seven hundred ninety".