3549391872 has 352 divisors, whose sum is σ = 10916634624. Its totient is φ = 1017446400.

The previous prime is 3549391829. The next prime is 3549391883. The reversal of 3549391872 is 2781939453.

It is a super-2 number, since 2×3549391872² = 25196365322039328768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58186722 + ... + 58186782.

Almost surely, 2^3549391872 is an apocalyptic number.

3549391872 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3549391872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5458317312).

3549391872 is an abundant number, since it is smaller than the sum of its proper divisors (7367242752).

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

3549391872 is a wasteful number, since it uses less digits than its factorization.

3549391872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 157 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 51.

The square root of 3549391872 is about 59576.7729236823. The cubic root of 3549391872 is about 1525.4031895675.

The spelling of 3549391872 in words is "three billion, five hundred forty-nine million, three hundred ninety-one thousand, eight hundred seventy-two".