3649872 has 20 divisors (see below), whose sum is σ = 9428960. Its totient is φ = 1216608.

The previous prime is 3649871. The next prime is 3649889. The reversal of 3649872 is 2789463.

3649872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3649872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37972 + ... + 38067.

It is an arithmetic number, because the mean of its divisors is an integer number (471448).

Almost surely, 2^3649872 is an apocalyptic number.

It is an amenable number.

3649872 is an abundant number, since it is smaller than the sum of its proper divisors (5779088).

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

3649872 is a wasteful number, since it uses less digits than its factorization.

3649872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76050 (or 76044 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 3649872 is about 1910.4638180295. The cubic root of 3649872 is about 153.9663725981.

The spelling of 3649872 in words is "three million, six hundred forty-nine thousand, eight hundred seventy-two".