3639249 has 20 divisors (see below), whose sum is σ = 5488560. Its totient is φ = 2403000.

The previous prime is 3639217. The next prime is 3639277. The reversal of 3639249 is 9429363.

It is a happy number.

It is not a de Polignac number, because 3639249 - 2⁵ = 3639217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3639289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14374 + ... + 14624.

It is an arithmetic number, because the mean of its divisors is an integer number (274428).

Almost surely, 2^3639249 is an apocalyptic number.

It is an amenable number.

3639249 is a deficient number, since it is larger than the sum of its proper divisors (1849311).

3639249 is a wasteful number, since it uses less digits than its factorization.

3639249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 433 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 3639249 is about 1907.6815772031. The cubic root of 3639249 is about 153.8168537342.

The spelling of 3639249 in words is "three million, six hundred thirty-nine thousand, two hundred forty-nine".