3646629 has 18 divisors (see below), whose sum is σ = 6128070. Its totient is φ = 2083536.

The previous prime is 3646603. The next prime is 3646633. The reversal of 3646629 is 9266463.

3646629 is a `hidden beast` number, since 3 + 646 + 6 + 2 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3572100 + 74529 = 1890^2 + 273^2 .

It is not a de Polignac number, because 3646629 - 2⁹ = 3646117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3646593 and 3646602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3646129) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3694 + ... + 4575.

Almost surely, 2^3646629 is an apocalyptic number.

It is an amenable number.

3646629 is a deficient number, since it is larger than the sum of its proper divisors (2481441).

3646629 is a wasteful number, since it uses less digits than its factorization.

3646629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8289 (or 8279 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 3646629 is about 1909.6148826400. The cubic root of 3646629 is about 153.9207581306.

It can be divided in two parts, 36 and 46629, that added together give a triangular number (46665 = T₃₀₅).

The spelling of 3646629 in words is "three million, six hundred forty-six thousand, six hundred twenty-nine".