3656722 has 4 divisors (see below), whose sum is σ = 5485086. Its totient is φ = 1828360.

The previous prime is 3656707. The next prime is 3656753. The reversal of 3656722 is 2276563.

3656722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2276563 = 23 ⋅98981.

It can be written as a sum of positive squares in only one way, i.e., 2313441 + 1343281 = 1521^2 + 1159^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 as a sum of consecutive naturals, namely, 914179 + ... + 914182.

Almost surely, 2^3656722 is an apocalyptic number.

3656722 is a deficient number, since it is larger than the sum of its proper divisors (1828364).

3656722 is a wasteful number, since it uses less digits than its factorization.

3656722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828363.

The product of its digits is 15120, while the sum is 31.

The square root of 3656722 is about 1912.2557360353. The cubic root of 3656722 is about 154.0626326446.

The spelling of 3656722 in words is "three million, six hundred fifty-six thousand, seven hundred twenty-two".