3647889 has 16 divisors (see below), whose sum is σ = 6176640. Its totient is φ = 2084400.

The previous prime is 3647873. The next prime is 3647921. The reversal of 3647889 is 9887463.

3647889 = T₁₂₆ + T₁₂₇ + ... + T₂₈₇.

It is a happy number.

It is not a de Polignac number, because 3647889 - 2⁴ = 3647873 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3647489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9462 + ... + 9839.

It is an arithmetic number, because the mean of its divisors is an integer number (386040).

Almost surely, 2^3647889 is an apocalyptic number.

It is an amenable number.

3647889 is a deficient number, since it is larger than the sum of its proper divisors (2528751).

3647889 is a wasteful number, since it uses less digits than its factorization.

3647889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19317 (or 19311 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 3647889 is about 1909.9447635992. The cubic root of 3647889 is about 153.9384838916.

The spelling of 3647889 in words is "three million, six hundred forty-seven thousand, eight hundred eighty-nine".