18414390 has 16 divisors (see below), whose sum is σ = 44194608. Its totient is φ = 4910496.

The previous prime is 18414377. The next prime is 18414413. The reversal of 18414390 is 9341481.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 613813 = 18414390 / (1 + 8 + 4 + 1 + 4 + 3 + 9 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306877 + ... + 306936.

It is an arithmetic number, because the mean of its divisors is an integer number (2762163).

Almost surely, 2^18414390 is an apocalyptic number.

18414390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18414390 is an abundant number, since it is smaller than the sum of its proper divisors (25780218).

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

18414390 is a wasteful number, since it uses less digits than its factorization.

18414390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613823.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 18414390 is about 4291.1991331095. The cubic root of 18414390 is about 264.0700284842.

The spelling of 18414390 in words is "eighteen million, four hundred fourteen thousand, three hundred ninety".