3847428 has 36 divisors (see below), whose sum is σ = 10474828. Its totient is φ = 1183680.

The previous prime is 3847421. The next prime is 3847433. The reversal of 3847428 is 8247483.

It can be written as a sum of positive squares in 2 ways, for example, as 2214144 + 1633284 = 1488^2 + 1278^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3847392 and 3847401.

It is not an unprimeable number, because it can be changed into a prime (3847421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3643 + ... + 4578.

Almost surely, 2^3847428 is an apocalyptic number.

It is an amenable number.

3847428 is an abundant number, since it is smaller than the sum of its proper divisors (6627400).

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

3847428 is a wasteful number, since it uses less digits than its factorization.

3847428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8244 (or 8239 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 3847428 is about 1961.4861712487. The cubic root of 3847428 is about 156.6956115726.

The spelling of 3847428 in words is "three million, eight hundred forty-seven thousand, four hundred twenty-eight".