3727221684 has 12 divisors (see below), whose sum is σ = 8696850624. Its totient is φ = 1242407224.

The previous prime is 3727221671. The next prime is 3727221749. The reversal of 3727221684 is 4861227273.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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, 155300892 + ... + 155300915.

It is an arithmetic number, because the mean of its divisors is an integer number (724737552).

Almost surely, 2^3727221684 is an apocalyptic number.

It is an amenable number.

3727221684 is an abundant number, since it is smaller than the sum of its proper divisors (4969628940).

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

3727221684 is a wasteful number, since it uses less digits than its factorization.

3727221684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310601814 (or 310601812 counting only the distinct ones).

The product of its digits is 225792, while the sum is 42.

The square root of 3727221684 is about 61050.9761101328. The cubic root of 3727221684 is about 1550.4641945104.

The spelling of 3727221684 in words is "three billion, seven hundred twenty-seven million, two hundred twenty-one thousand, six hundred eighty-four".