3950421816 has 64 divisors (see below), whose sum is σ = 11003143680. Its totient is φ = 1171623680.

The previous prime is 3950421799. The next prime is 3950421829. The reversal of 3950421816 is 6181240593.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146781 + ... + 171596.

It is an arithmetic number, because the mean of its divisors is an integer number (171924120).

Almost surely, 2^3950421816 is an apocalyptic number.

It is an amenable number.

3950421816 is an abundant number, since it is smaller than the sum of its proper divisors (7052721864).

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

3950421816 is a wasteful number, since it uses less digits than its factorization.

3950421816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318444 (or 318440 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 3950421816 is about 62852.3811482111. The cubic root of 3950421816 is about 1580.8153960331.

The spelling of 3950421816 in words is "three billion, nine hundred fifty million, four hundred twenty-one thousand, eight hundred sixteen".