3549944736 has 72 divisors (see below), whose sum is σ = 10871717220. Its totient is φ = 1092289536.

The previous prime is 3549944731. The next prime is 3549944747. The reversal of 3549944736 is 6374499453.

It is a happy number.

3549944736 is a `hidden beast` number, since 3 + 549 + 94 + 4 + 7 + 3 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3546917136 + 3027600 = 59556^2 + 1740^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (3549944731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 470341 + ... + 477828.

Almost surely, 2^3549944736 is an apocalyptic number.

3549944736 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3549944736 is an abundant number, since it is smaller than the sum of its proper divisors (7321772484).

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

3549944736 is a wasteful number, since it uses less digits than its factorization.

3549944736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948198 (or 948187 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 54.

The square root of 3549944736 is about 59581.4126720742. The cubic root of 3549944736 is about 1525.4823859253.

The spelling of 3549944736 in words is "three billion, five hundred forty-nine million, nine hundred forty-four thousand, seven hundred thirty-six".