3621980052 has 36 divisors (see below), whose sum is σ = 9157386420. Its totient is φ = 1207085952.

The previous prime is 3621979967. The next prime is 3621980053. The reversal of 3621980052 is 2500891263.

It can be written as a sum of positive squares in 2 ways, for example, as 1832182416 + 1789797636 = 42804^2 + 42306^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3621979989 and 3621980016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3621980053) 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 11 ways as a sum of consecutive naturals, for example, 352378 + ... + 362510.

It is an arithmetic number, because the mean of its divisors is an integer number (254371845).

Almost surely, 2^3621980052 is an apocalyptic number.

It is an amenable number.

3621980052 is an abundant number, since it is smaller than the sum of its proper divisors (5535406368).

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

3621980052 is a wasteful number, since it uses less digits than its factorization.

3621980052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20072 (or 20067 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 3621980052 is about 60182.8883653817. Note that the first 3 decimals coincide. The cubic root of 3621980052 is about 1535.7317087152.

The spelling of 3621980052 in words is "three billion, six hundred twenty-one million, nine hundred eighty thousand, fifty-two".