3688261 has 4 divisors (see below), whose sum is σ = 3882400. Its totient is φ = 3494124.

The previous prime is 3688247. The next prime is 3688277. The reversal of 3688261 is 1628863.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1628863 = 1091 ⋅1493.

It is a cyclic number.

It is not a de Polignac number, because 3688261 - 2¹⁷ = 3557189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3688241) 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, 97041 + ... + 97078.

It is an arithmetic number, because the mean of its divisors is an integer number (970600).

Almost surely, 2^3688261 is an apocalyptic number.

It is an amenable number.

3688261 is a deficient number, since it is larger than the sum of its proper divisors (194139).

3688261 is a wasteful number, since it uses less digits than its factorization.

3688261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194138.

The product of its digits is 13824, while the sum is 34.

The square root of 3688261 is about 1920.4845742677. The cubic root of 3688261 is about 154.5042921832.

The spelling of 3688261 in words is "three million, six hundred eighty-eight thousand, two hundred sixty-one".