18408348 has 72 divisors (see below), whose sum is σ = 56320992. Its totient is φ = 4948992.

The previous prime is 18408347. The next prime is 18408371. The reversal of 18408348 is 84380481.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18408347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2136 + ... + 6432.

It is an arithmetic number, because the mean of its divisors is an integer number (782236).

Almost surely, 2^18408348 is an apocalyptic number.

18408348 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18408348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28160496).

18408348 is an abundant number, since it is smaller than the sum of its proper divisors (37912644).

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

18408348 is a wasteful number, since it uses less digits than its factorization.

18408348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4331 (or 4326 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 18408348 is about 4290.4950763286. The cubic root of 18408348 is about 264.0411437253.

The spelling of 18408348 in words is "eighteen million, four hundred eight thousand, three hundred forty-eight".