3847820 has 12 divisors (see below), whose sum is σ = 8080464. Its totient is φ = 1539120.

The previous prime is 3847817. The next prime is 3847829. The reversal of 3847820 is 287483.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3847829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96176 + ... + 96215.

It is an arithmetic number, because the mean of its divisors is an integer number (673372).

Almost surely, 2^3847820 is an apocalyptic number.

It is an amenable number.

3847820 is an abundant number, since it is smaller than the sum of its proper divisors (4232644).

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

3847820 is a wasteful number, since it uses less digits than its factorization.

3847820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192400 (or 192398 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 3847820 is about 1961.5860929360. The cubic root of 3847820 is about 156.7009331012.

The spelling of 3847820 in words is "three million, eight hundred forty-seven thousand, eight hundred twenty".