3804721668 has 36 divisors (see below), whose sum is σ = 10491809328. Its totient is φ = 1152945840.

The previous prime is 3804721643. The next prime is 3804721691. The reversal of 3804721668 is 8661274083.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4803546 + ... + 4804337.

It is an arithmetic number, because the mean of its divisors is an integer number (291439148).

Almost surely, 2^3804721668 is an apocalyptic number.

It is an amenable number.

3804721668 is an abundant number, since it is smaller than the sum of its proper divisors (6687087660).

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

3804721668 is a wasteful number, since it uses less digits than its factorization.

3804721668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9607904 (or 9607899 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 3804721668 is about 61682.4259250558. The cubic root of 3804721668 is about 1561.1368094455.

The spelling of 3804721668 in words is "three billion, eight hundred four million, seven hundred twenty-one thousand, six hundred sixty-eight".