3656631 has 8 divisors (see below), whose sum is σ = 5318784. Its totient is φ = 2216120.

The previous prime is 3656621. The next prime is 3656633. The reversal of 3656631 is 1366563.

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 3656631 - 2¹³ = 3648439 is a prime.

It is a super-2 number, since 2×3656631² = 26741900540322, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3656633) 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, 55371 + ... + 55436.

It is an arithmetic number, because the mean of its divisors is an integer number (664848).

Almost surely, 2^3656631 is an apocalyptic number.

3656631 is a deficient number, since it is larger than the sum of its proper divisors (1662153).

3656631 is a wasteful number, since it uses less digits than its factorization.

3656631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110821.

The product of its digits is 9720, while the sum is 30.

The square root of 3656631 is about 1912.2319419987. The cubic root of 3656631 is about 154.0613546497.

It can be divided in two parts, 365 and 6631, that added together give a palindrome (6996).

The spelling of 3656631 in words is "three million, six hundred fifty-six thousand, six hundred thirty-one".