3784681 has 4 divisors (see below), whose sum is σ = 3797892. Its totient is φ = 3771472.

The previous prime is 3784657. The next prime is 3784687. The reversal of 3784681 is 1864873.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2958400 + 826281 = 1720^2 + 909^2 .

It is a cyclic number.

It is not a de Polignac number, because 3784681 - 2⁹ = 3784169 is a prime.

It is a super-2 number, since 2×3784681² = 28647620543522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3784681.

It is not an unprimeable number, because it can be changed into a prime (3784687) 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, 6166 + ... + 6751.

It is an arithmetic number, because the mean of its divisors is an integer number (949473).

Almost surely, 2^3784681 is an apocalyptic number.

It is an amenable number.

3784681 is a deficient number, since it is larger than the sum of its proper divisors (13211).

3784681 is a wasteful number, since it uses less digits than its factorization.

3784681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13210.

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

The square root of 3784681 is about 1945.4256603633. The cubic root of 3784681 is about 155.8390982898.

It can be divided in two parts, 3784 and 681, that added together give a triangular number (4465 = T₉₄).

The spelling of 3784681 in words is "three million, seven hundred eighty-four thousand, six hundred eighty-one".