3971519850 has 48 divisors (see below), whose sum is σ = 9866654208. Its totient is φ = 1057213440.

The previous prime is 3971519807. The next prime is 3971519857. The reversal of 3971519850 is 589151793.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3971519850.

It is not an unprimeable number, because it can be changed into a prime (3971519857) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 63607 + ... + 109493.

It is an arithmetic number, because the mean of its divisors is an integer number (205555296).

Almost surely, 2^3971519850 is an apocalyptic number.

3971519850 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3971519850 is an abundant number, since it is smaller than the sum of its proper divisors (5895134358).

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

3971519850 is a wasteful number, since it uses less digits than its factorization.

3971519850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46479 (or 46474 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 48.

The square root of 3971519850 is about 63019.9956363058. The cubic root of 3971519850 is about 1583.6246232925.

The spelling of 3971519850 in words is "three billion, nine hundred seventy-one million, five hundred nineteen thousand, eight hundred fifty".