3646940 has 48 divisors (see below), whose sum is σ = 8485344. Its totient is φ = 1316480.

The previous prime is 3646931. The next prime is 3646957. The reversal of 3646940 is 496463.

It is a junction number, because it is equal to n+sod(n) for n = 3646897 and 3646906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26552 + ... + 26688.

It is an arithmetic number, because the mean of its divisors is an integer number (176778).

Almost surely, 2^3646940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3646940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4242672).

3646940 is an abundant number, since it is smaller than the sum of its proper divisors (4838404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3646940 is a wasteful number, since it uses less digits than its factorization.

3646940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 3646940 is about 1909.6963109353. The cubic root of 3646940 is about 153.9251336780.

The spelling of 3646940 in words is "three million, six hundred forty-six thousand, nine hundred forty".