3631221280 has 48 divisors (see below), whose sum is σ = 8630193600. Its totient is φ = 1443780352.

The previous prime is 3631221263. The next prime is 3631221281. The reversal of 3631221280 is 821221363.

It is not an unprimeable number, because it can be changed into a prime (3631221281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41230 + ... + 94669.

It is an arithmetic number, because the mean of its divisors is an integer number (179795700).

Almost surely, 2^3631221280 is an apocalyptic number.

It is an amenable number.

3631221280 is an abundant number, since it is smaller than the sum of its proper divisors (4998972320).

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

3631221280 is a wasteful number, since it uses less digits than its factorization.

3631221280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136081 (or 136073 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 3631221280 is about 60259.6156642241. The cubic root of 3631221280 is about 1537.0367033810.

The spelling of 3631221280 in words is "three billion, six hundred thirty-one million, two hundred twenty-one thousand, two hundred eighty".