2639408 has 10 divisors (see below), whose sum is σ = 5113884. Its totient is φ = 1319696.

The previous prime is 2639407. The next prime is 2639419. The reversal of 2639408 is 8049362.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2639401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82466 + ... + 82497.

2^2639408 is an apocalyptic number.

It is an amenable number.

2639408 is a deficient number, since it is larger than the sum of its proper divisors (2474476).

2639408 is a wasteful number, since it uses less digits than its factorization.

2639408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164971 (or 164965 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 2639408 is about 1624.6254953065. The cubic root of 2639408 is about 138.1981330942.

The spelling of 2639408 in words is "two million, six hundred thirty-nine thousand, four hundred eight".