3643950 has 48 divisors (see below), whose sum is σ = 9575280. Its totient is φ = 913920.

The previous prime is 3643921. The next prime is 3643951. The reversal of 3643950 is 593463.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3643951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1836 + ... + 3264.

It is an arithmetic number, because the mean of its divisors is an integer number (199485).

Almost surely, 2^3643950 is an apocalyptic number.

3643950 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3643950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4787640).

3643950 is an abundant number, since it is smaller than the sum of its proper divisors (5931330).

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

3643950 is a wasteful number, since it uses less digits than its factorization.

3643950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461 (or 1456 counting only the distinct ones).

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

The square root of 3643950 is about 1908.9133034268. The cubic root of 3643950 is about 153.8830562118.

The spelling of 3643950 in words is "three million, six hundred forty-three thousand, nine hundred fifty".