3549720720 has 640 divisors, whose sum is σ = 14399078400. Its totient is φ = 718018560.

The previous prime is 3549720697. The next prime is 3549720737. The reversal of 3549720720 is 270279453.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 33174907 + ... + 33175013.

It is an arithmetic number, because the mean of its divisors is an integer number (22498560).

Almost surely, 2^3549720720 is an apocalyptic number.

3549720720 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 3549720720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7199539200).

3549720720 is an abundant number, since it is smaller than the sum of its proper divisors (10849357680).

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

3549720720 is a wasteful number, since it uses less digits than its factorization.

3549720720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 3549720720 is about 59579.5327272714. The cubic root of 3549720720 is about 1525.4502971957.

The spelling of 3549720720 in words is "three billion, five hundred forty-nine million, seven hundred twenty thousand, seven hundred twenty".