3781684 has 24 divisors (see below), whose sum is σ = 7378560. Its totient is φ = 1685376.

The previous prime is 3781669. The next prime is 3781691. The reversal of 3781684 is 4861873.

3781684 = T₄₂₇ + T₄₂₈ + ... + T₄₆₄.

It is a happy number.

3781684 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3781684² = 28602267751712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172 + ... + 2755.

It is an arithmetic number, because the mean of its divisors is an integer number (307440).

Almost surely, 2^3781684 is an apocalyptic number.

3781684 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

3781684 is a deficient number, since it is larger than the sum of its proper divisors (3596876).

3781684 is a wasteful number, since it uses less digits than its factorization.

3781684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967 (or 2965 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 3781684 is about 1944.6552393676. The cubic root of 3781684 is about 155.7979523197.

It can be divided in two parts, 3781 and 684, that added together give a triangular number (4465 = T₉₄).

The spelling of 3781684 in words is "three million, seven hundred eighty-one thousand, six hundred eighty-four".