16180398 has 72 divisors (see below), whose sum is σ = 39567528. Its totient is φ = 4953312.

The previous prime is 16180391. The next prime is 16180421. The reversal of 16180398 is 89308161.

16180398 is a `hidden beast` number, since 1 + 618 + 0 + 39 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16180391) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 82036 + ... + 82232.

It is an arithmetic number, because the mean of its divisors is an integer number (549549).

Almost surely, 2^16180398 is an apocalyptic number.

16180398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16180398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19783764).

16180398 is an abundant number, since it is smaller than the sum of its proper divisors (23387130).

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

16180398 is a wasteful number, since it uses less digits than its factorization.

16180398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 16180398 is about 4022.4865444150. The cubic root of 16180398 is about 252.9277030480.

The spelling of 16180398 in words is "sixteen million, one hundred eighty thousand, three hundred ninety-eight".