3681289 has 8 divisors (see below), whose sum is σ = 3872520. Its totient is φ = 3494400.

The previous prime is 3681287. The next prime is 3681319. The reversal of 3681289 is 9821863.

3681289 = T₁₀₂ + T₁₀₃ + ... + T₂₈₄.

It can be written as a sum of positive squares in 4 ways, for example, as 6400 + 3674889 = 80^2 + 1917^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3681289 - 2¹ = 3681287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3681283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 729 + ... + 2809.

It is an arithmetic number, because the mean of its divisors is an integer number (484065).

Almost surely, 2^3681289 is an apocalyptic number.

It is an amenable number.

3681289 is a deficient number, since it is larger than the sum of its proper divisors (191231).

3681289 is a wasteful number, since it uses less digits than its factorization.

3681289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171.

The product of its digits is 20736, while the sum is 37.

The square root of 3681289 is about 1918.6685487598. The cubic root of 3681289 is about 154.4068765003.

The spelling of 3681289 in words is "three million, six hundred eighty-one thousand, two hundred eighty-nine".