18395490 has 32 divisors (see below), whose sum is σ = 44292096. Its totient is φ = 4889600.

The previous prime is 18395473. The next prime is 18395527. The reversal of 18395490 is 9459381.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10690 + ... + 12290.

It is an arithmetic number, because the mean of its divisors is an integer number (1384128).

Almost surely, 2^18395490 is an apocalyptic number.

18395490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18395490 is an abundant number, since it is smaller than the sum of its proper divisors (25896606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18395490 is a wasteful number, since it uses less digits than its factorization.

18395490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 18395490 is about 4288.9963861025. The cubic root of 18395490 is about 263.9796529314.

The spelling of 18395490 in words is "eighteen million, three hundred ninety-five thousand, four hundred ninety".