3549041972 has 54 divisors (see below), whose sum is σ = 7278078402. Its totient is φ = 1509875808.

The previous prime is 3549041971. The next prime is 3549041989. The reversal of 3549041972 is 2791409453.

It can be written as a sum of positive squares in only one way, i.e., 2194360336 + 1354681636 = 46844^2 + 36806^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3549041971) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11195558 + ... + 11195874.

Almost surely, 2^3549041972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3549041972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3639039201).

3549041972 is an abundant number, since it is smaller than the sum of its proper divisors (3729036430).

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

3549041972 is a wasteful number, since it uses less digits than its factorization.

3549041972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813 (or 565 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 3549041972 is about 59573.8363042032. The cubic root of 3549041972 is about 1525.3530630356.

The spelling of 3549041972 in words is "three billion, five hundred forty-nine million, forty-one thousand, nine hundred seventy-two".