3940721950 has 72 divisors (see below), whose sum is σ = 8077154904. Its totient is φ = 1429348800.

The previous prime is 3940721947. The next prime is 3940722001. The reversal of 3940721950 is 591270493.

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 35 ways as a sum of consecutive naturals, for example, 3889644 + ... + 3890656.

It is an arithmetic number, because the mean of its divisors is an integer number (112182707).

Almost surely, 2^3940721950 is an apocalyptic number.

3940721950 is an abundant number, since it is smaller than the sum of its proper divisors (4136432954).

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

3940721950 is a wasteful number, since it uses less digits than its factorization.

3940721950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690 (or 1674 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 3940721950 is about 62775.1698524186. The cubic root of 3940721950 is about 1579.5204908731.

The spelling of 3940721950 in words is "three billion, nine hundred forty million, seven hundred twenty-one thousand, nine hundred fifty".