3847984 has 80 divisors (see below), whose sum is σ = 9427968. Its totient is φ = 1483776.

The previous prime is 3847939. The next prime is 3848017. The reversal of 3847984 is 4897483.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 3847984.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81849 + ... + 81895.

Almost surely, 2^3847984 is an apocalyptic number.

3847984 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3847984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4713984).

3847984 is an abundant number, since it is smaller than the sum of its proper divisors (5579984).

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

3847984 is a wasteful number, since it uses less digits than its factorization.

3847984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 116 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 3847984 is about 1961.6278953971. The cubic root of 3847984 is about 156.7031593477.

The spelling of 3847984 in words is "three million, eight hundred forty-seven thousand, nine hundred eighty-four".