18867408 has 80 divisors (see below), whose sum is σ = 56174976. Its totient is φ = 5345280.

The previous prime is 18867403. The next prime is 18867427. The reversal of 18867408 is 80476881.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 18867408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18867403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78168 + ... + 78408.

Almost surely, 2^18867408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18867408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28087488).

18867408 is an abundant number, since it is smaller than the sum of its proper divisors (37307568).

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

18867408 is a wasteful number, since it uses less digits than its factorization.

18867408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 18867408 is about 4343.6629703512. The cubic root of 18867408 is about 266.2179983138.

The spelling of 18867408 in words is "eighteen million, eight hundred sixty-seven thousand, four hundred eight".