3847291879420 has 48 divisors (see below), whose sum is σ = 8814360941568. Its totient is φ = 1398925546560.

The previous prime is 3847291879397. The next prime is 3847291879421. The reversal of 3847291879420 is 249781927483.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3847291879421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2928457 + ... + 4033663.

It is an arithmetic number, because the mean of its divisors is an integer number (183632519616).

Almost surely, 2^{3847291879420} is an apocalyptic number.

It is an amenable number.

3847291879420 is an abundant number, since it is smaller than the sum of its proper divisors (4967069062148).

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

3847291879420 is a wasteful number, since it uses less digits than its factorization.

3847291879420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121050 (or 1121048 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 64.

The spelling of 3847291879420 in words is "three trillion, eight hundred forty-seven billion, two hundred ninety-one million, eight hundred seventy-nine thousand, four hundred twenty".