3678641 has 4 divisors (see below), whose sum is σ = 3712500. Its totient is φ = 3644784.

The previous prime is 3678617. The next prime is 3678659. The reversal of 3678641 is 1468763.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1468763 = 29 ⋅50647.

It can be written as a sum of positive squares in 2 ways, for example, as 3045025 + 633616 = 1745^2 + 796^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3678641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3678601) 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, 16766 + ... + 16983.

It is an arithmetic number, because the mean of its divisors is an integer number (928125).

Almost surely, 2^3678641 is an apocalyptic number.

It is an amenable number.

3678641 is a deficient number, since it is larger than the sum of its proper divisors (33859).

3678641 is a wasteful number, since it uses less digits than its factorization.

3678641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33858.

The product of its digits is 24192, while the sum is 35.

The square root of 3678641 is about 1917.9783627560. The cubic root of 3678641 is about 154.3698453152.

The spelling of 3678641 in words is "three million, six hundred seventy-eight thousand, six hundred forty-one".