3705071220 has 120 divisors (see below), whose sum is σ = 11937272424. Its totient is φ = 961300224.

The previous prime is 3705071189. The next prime is 3705071263. The reversal of 3705071220 is 221705073.

3705071220 is a `hidden beast` number, since 37 + 0 + 507 + 122 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1576725264 + 2128345956 = 39708^2 + 46134^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 29034 + ... + 90846.

Almost surely, 2^3705071220 is an apocalyptic number.

3705071220 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 3705071220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5968636212).

3705071220 is an abundant number, since it is smaller than the sum of its proper divisors (8232201204).

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

3705071220 is a wasteful number, since it uses less digits than its factorization.

3705071220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61871 (or 61860 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 3705071220 is about 60869.2962009583. The cubic root of 3705071220 is about 1547.3866778902.

Adding to 3705071220 its reverse (221705073), we get a palindrome (3926776293).

The spelling of 3705071220 in words is "three billion, seven hundred five million, seventy-one thousand, two hundred twenty".