3784840 has 16 divisors (see below), whose sum is σ = 8515980. Its totient is φ = 1513920.

The previous prime is 3784813. The next prime is 3784849. The reversal of 3784840 is 484873.

It can be written as a sum of positive squares in 2 ways, for example, as 3392964 + 391876 = 1842^2 + 626^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3784796 and 3784805.

It is not an unprimeable number, because it can be changed into a prime (3784849) 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, 47271 + ... + 47350.

Almost surely, 2^3784840 is an apocalyptic number.

It is an amenable number.

3784840 is an abundant number, since it is smaller than the sum of its proper divisors (4731140).

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

3784840 is a wasteful number, since it uses less digits than its factorization.

3784840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94632 (or 94628 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 3784840 is about 1945.4665250268. The cubic root of 3784840 is about 155.8412806023.

It can be divided in two parts, 3784 and 840, that added together give a square (4624 = 68²).

The spelling of 3784840 in words is "three million, seven hundred eighty-four thousand, eight hundred forty".