3720781160 has 128 divisors (see below), whose sum is σ = 9130695840. Its totient is φ = 1359052800.

The previous prime is 3720781159. The next prime is 3720781189. The reversal of 3720781160 is 611870273.

It can be written as a sum of positive squares in 16 ways, for example, as 686754436 + 3034026724 = 26206^2 + 55082^2 .

It is a super-2 number, since 2×3720781160² = 27688424881221891200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3720781160.

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, 8837750 + ... + 8838170.

Almost surely, 2^3720781160 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 3720781160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4565347920).

3720781160 is an abundant number, since it is smaller than the sum of its proper divisors (5409914680).

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

3720781160 is a wasteful number, since it uses less digits than its factorization.

3720781160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 3720781160 is about 60998.2062031335. The cubic root of 3720781160 is about 1549.5706282074.

The spelling of 3720781160 in words is "three billion, seven hundred twenty million, seven hundred eighty-one thousand, one hundred sixty".