1808416 has 24 divisors (see below), whose sum is σ = 3677184. Its totient is φ = 874560.

The previous prime is 1808399. The next prime is 1808431. The reversal of 1808416 is 6148081.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81 + ... + 1903.

It is an arithmetic number, because the mean of its divisors is an integer number (153216).

2^1808416 is an apocalyptic number.

1808416 is a gapful number since it is divisible by the number (16) 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 1808416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1838592).

1808416 is an abundant number, since it is smaller than the sum of its proper divisors (1868768).

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

1808416 is a wasteful number, since it uses less digits than its factorization.

1808416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864 (or 1856 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1808416 is about 1344.7735868911. The cubic root of 1808416 is about 121.8333296945.

The spelling of 1808416 in words is "one million, eight hundred eight thousand, four hundred sixteen".