3784640 has 28 divisors (see below), whose sum is σ = 9012936. Its totient is φ = 1513728.

The previous prime is 3784639. The next prime is 3784643. The reversal of 3784640 is 464873.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 3784597 and 3784606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3784643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5594 + ... + 6233.

Almost surely, 2^3784640 is an apocalyptic number.

It is an amenable number.

3784640 is an abundant number, since it is smaller than the sum of its proper divisors (5228296).

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

3784640 is a wasteful number, since it uses less digits than its factorization.

3784640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11844 (or 11834 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 3784640 is about 1945.4151227951. The cubic root of 3784640 is about 155.8385355453.

The spelling of 3784640 in words is "three million, seven hundred eighty-four thousand, six hundred forty".