2147808 has 48 divisors (see below), whose sum is σ = 6075216. Its totient is φ = 660480.

The previous prime is 2147801. The next prime is 2147839. The reversal of 2147808 is 8087412.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×2147808² = 9226158409728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388 + ... + 2108.

It is an arithmetic number, because the mean of its divisors is an integer number (126567).

2^2147808 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 2147808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3037608).

2147808 is an abundant number, since it is smaller than the sum of its proper divisors (3927408).

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

2147808 is a wasteful number, since it uses less digits than its factorization.

2147808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747 (or 1739 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 2147808 is about 1465.5401734514. The cubic root of 2147808 is about 129.0224106248.

The spelling of 2147808 in words is "two million, one hundred forty-seven thousand, eight hundred eight".