3847240 has 16 divisors (see below), whose sum is σ = 8656380. Its totient is φ = 1538880.

The previous prime is 3847237. The next prime is 3847241. The reversal of 3847240 is 427483.

It can be written as a sum of positive squares in 2 ways, for example, as 3526884 + 320356 = 1878^2 + 566^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3847199 and 3847208.

It is not an unprimeable number, because it can be changed into a prime (3847241) 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, 48051 + ... + 48130.

Almost surely, 2^3847240 is an apocalyptic number.

It is an amenable number.

3847240 is an abundant number, since it is smaller than the sum of its proper divisors (4809140).

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

3847240 is a wasteful number, since it uses less digits than its factorization.

3847240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96192 (or 96188 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 3847240 is about 1961.4382478171. The cubic root of 3847240 is about 156.6930592827.

It can be divided in two parts, 38 and 47240, that added together give a triangular number (47278 = T₃₀₇).

The spelling of 3847240 in words is "three million, eight hundred forty-seven thousand, two hundred forty".