3639447 has 24 divisors (see below), whose sum is σ = 6158880. Its totient is φ = 2027520.

The previous prime is 3639421. The next prime is 3639473. The reversal of 3639447 is 7449363.

It is an interprime number because it is at equal distance from previous prime (3639421) and next prime (3639473).

It is not a de Polignac number, because 3639447 - 2⁷ = 3639319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1879 + ... + 3287.

It is an arithmetic number, because the mean of its divisors is an integer number (256620).

Almost surely, 2^3639447 is an apocalyptic number.

3639447 is a deficient number, since it is larger than the sum of its proper divisors (2519433).

3639447 is a wasteful number, since it uses less digits than its factorization.

3639447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463 (or 1460 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 3639447 is about 1907.7334719504. The cubic root of 3639447 is about 153.8196432461.

The spelling of 3639447 in words is "three million, six hundred thirty-nine thousand, four hundred forty-seven".