2439808 has 48 divisors (see below), whose sum is σ = 5668650. Its totient is φ = 1042944.

The previous prime is 2439803. The next prime is 2439839. The reversal of 2439808 is 8089342.

It can be written as a sum of positive squares in only one way, i.e., 2286144 + 153664 = 1512^2 + 392^2 .

It is a d-powerful number, because it can be written as 2¹⁸ + 4 + 3¹³ + 9⁵ + 8⁶ + 0 + 8⁶ .

It is not an unprimeable number, because it can be changed into a prime (2439803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6078 + ... + 6466.

2^2439808 is an apocalyptic number.

2439808 is a gapful number since it is divisible by the number (28) 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 2439808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2834325).

2439808 is an abundant number, since it is smaller than the sum of its proper divisors (3228842).

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

2439808 is an equidigital number, since it uses as much as digits as its factorization.

2439808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 2439808 is about 1561.9884762699. The cubic root of 2439808 is about 134.6227786708.

The spelling of 2439808 in words is "two million, four hundred thirty-nine thousand, eight hundred eight".