3671221720 has 16 divisors (see below), whose sum is σ = 8260248960. Its totient is φ = 1468488672.

The previous prime is 3671221703. The next prime is 3671221753. The reversal of 3671221720 is 271221763.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 45890232 + ... + 45890311.

It is an arithmetic number, because the mean of its divisors is an integer number (516265560).

Almost surely, 2^3671221720 is an apocalyptic number.

It is an amenable number.

3671221720 is an abundant number, since it is smaller than the sum of its proper divisors (4589027240).

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

3671221720 is a wasteful number, since it uses less digits than its factorization.

3671221720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91780554 (or 91780550 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 3671221720 is about 60590.6075229486. The cubic root of 3671221720 is about 1542.6599501228.

The spelling of 3671221720 in words is "three billion, six hundred seventy-one million, two hundred twenty-one thousand, seven hundred twenty".