3547221720 has 192 divisors, whose sum is σ = 13031020800. Its totient is φ = 768096000.

The previous prime is 3547221719. The next prime is 3547221749. The reversal of 3547221720 is 271227453.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 95845 + ... + 127595.

It is an arithmetic number, because the mean of its divisors is an integer number (67869900).

Almost surely, 2^3547221720 is an apocalyptic number.

3547221720 is a gapful number since it is divisible by the number (30) 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 3547221720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6515510400).

3547221720 is an abundant number, since it is smaller than the sum of its proper divisors (9483799080).

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

3547221720 is a wasteful number, since it uses less digits than its factorization.

3547221720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31798 (or 31787 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 33.

The square root of 3547221720 is about 59558.5570678135. The cubic root of 3547221720 is about 1525.0922413076.

The spelling of 3547221720 in words is "three billion, five hundred forty-seven million, two hundred twenty-one thousand, seven hundred twenty".