3646429 has 4 divisors (see below), whose sum is σ = 3650560. Its totient is φ = 3642300.

The previous prime is 3646427. The next prime is 3646441. The reversal of 3646429 is 9246463.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3646429 - 2¹ = 3646427 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3646394 and 3646403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3646421) 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, 147 + ... + 2704.

It is an arithmetic number, because the mean of its divisors is an integer number (912640).

Almost surely, 2^3646429 is an apocalyptic number.

It is an amenable number.

3646429 is a deficient number, since it is larger than the sum of its proper divisors (4131).

3646429 is a wasteful number, since it uses less digits than its factorization.

3646429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4130.

The product of its digits is 31104, while the sum is 34.

The square root of 3646429 is about 1909.5625153422. The cubic root of 3646429 is about 153.9179441422.

Adding to 3646429 its sum of digits (34), we get a palindrome (3646463).

The spelling of 3646429 in words is "three million, six hundred forty-six thousand, four hundred twenty-nine".