4161640 has 64 divisors (see below), whose sum is σ = 10886400. Its totient is φ = 1402368.

The previous prime is 4161637. The next prime is 4161653. The reversal of 4161640 is 461614.

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, 24837 + ... + 25003.

It is an arithmetic number, because the mean of its divisors is an integer number (170100).

Almost surely, 2^4161640 is an apocalyptic number.

4161640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4161640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5443200).

4161640 is an abundant number, since it is smaller than the sum of its proper divisors (6724760).

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

4161640 is a wasteful number, since it uses less digits than its factorization.

4161640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 4161640 is about 2040.0098038980. The cubic root of 4161640 is about 160.8501621510.

The spelling of 4161640 in words is "four million, one hundred sixty-one thousand, six hundred forty".