2639808 has 42 divisors (see below), whose sum is σ = 7568184. Its totient is φ = 879744.

The previous prime is 2639801. The next prime is 2639809. The reversal of 2639808 is 8089362.

2639808 is nontrivially palindromic in base 15.

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 (2639801) 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, 1716 + ... + 2867.

2^2639808 is an apocalyptic number.

It is an amenable number.

2639808 is an abundant number, since it is smaller than the sum of its proper divisors (4928376).

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

2639808 is a wasteful number, since it uses less digits than its factorization.

2639808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4601 (or 4588 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 2639808 is about 1624.7485959372. The cubic root of 2639808 is about 138.2051140108.

It can be divided in two parts, 2639 and 808, that multiplied together give a palindrome (2132312).

The spelling of 2639808 in words is "two million, six hundred thirty-nine thousand, eight hundred eight".