18428346 has 24 divisors (see below), whose sum is σ = 40188564. Its totient is φ = 6102720.

The previous prime is 18428341. The next prime is 18428413. The reversal of 18428346 is 64382481.

It can be written as a sum of positive squares in 2 ways, for example, as 18020025 + 408321 = 4245^2 + 639^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18428346.

It is not an unprimeable number, because it can be changed into a prime (18428341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 435 + ... + 6086.

Almost surely, 2^18428346 is an apocalyptic number.

18428346 is an abundant number, since it is smaller than the sum of its proper divisors (21760218).

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

18428346 is a wasteful number, since it uses less digits than its factorization.

18428346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6686 (or 6683 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 18428346 is about 4292.8249440200. The cubic root of 18428346 is about 264.1367232571.

The spelling of 18428346 in words is "eighteen million, four hundred twenty-eight thousand, three hundred forty-six".