3621157320 has 192 divisors, whose sum is σ = 12051970560. Its totient is φ = 869693440.

The previous prime is 3621157277. The next prime is 3621157327. The reversal of 3621157320 is 237511263.

It is a super-2 number, since 2×3621157320² = 26225560672379164800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (3621157327) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1639657 + ... + 1641863.

It is an arithmetic number, because the mean of its divisors is an integer number (62770680).

Almost surely, 2^3621157320 is an apocalyptic number.

3621157320 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 3621157320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6025985280).

3621157320 is an abundant number, since it is smaller than the sum of its proper divisors (8430813240).

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

3621157320 is a wasteful number, since it uses less digits than its factorization.

3621157320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356 (or 2341 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 3621157320 is about 60176.0527120216. The cubic root of 3621157320 is about 1535.6154195325.

Adding to 3621157320 its reverse (237511263), we get a palindrome (3858668583).

The spelling of 3621157320 in words is "three billion, six hundred twenty-one million, one hundred fifty-seven thousand, three hundred twenty".