3649853844 has 120 divisors (see below), whose sum is σ = 11743404288. Its totient is φ = 962591040.

The previous prime is 3649853821. The next prime is 3649853891. The reversal of 3649853844 is 4483589463.

3649853844 is a `hidden beast` number, since 3 + 64 + 9 + 8 + 538 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 32412 + ... + 91379.

Almost surely, 2^3649853844 is an apocalyptic number.

It is an amenable number.

3649853844 is an abundant number, since it is smaller than the sum of its proper divisors (8093550444).

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

3649853844 is a wasteful number, since it uses less digits than its factorization.

3649853844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123827 (or 123816 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 54.

The square root of 3649853844 is about 60414.0202602012. The cubic root of 3649853844 is about 1539.6611729979.

The spelling of 3649853844 in words is "three billion, six hundred forty-nine million, eight hundred fifty-three thousand, eight hundred forty-four".