3722631220 has 192 divisors, whose sum is σ = 10012907520. Its totient is φ = 1129075200.

The previous prime is 3722631181. The next prime is 3722631223. The reversal of 3722631220 is 221362273.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3722631223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11246455 + ... + 11246785.

It is an arithmetic number, because the mean of its divisors is an integer number (52150560).

Almost surely, 2^3722631220 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 3722631220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5006453760).

3722631220 is an abundant number, since it is smaller than the sum of its proper divisors (6290276300).

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

3722631220 is a wasteful number, since it uses less digits than its factorization.

3722631220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 3722631220 is about 61013.3691906946. The cubic root of 3722631220 is about 1549.8274133194.

Adding to 3722631220 its reverse (221362273), we get a palindrome (3943993493).

The spelling of 3722631220 in words is "three billion, seven hundred twenty-two million, six hundred thirty-one thousand, two hundred twenty".