4331640 has 32 divisors (see below), whose sum is σ = 12995280. Its totient is φ = 1155072.

The previous prime is 4331611. The next prime is 4331641. The reversal of 4331640 is 461334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4331641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17929 + ... + 18168.

Almost surely, 2^4331640 is an apocalyptic number.

4331640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4331640 is an abundant number, since it is smaller than the sum of its proper divisors (8663640).

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

4331640 is a wasteful number, since it uses less digits than its factorization.

4331640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36111 (or 36107 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 4331640 is about 2081.2592342137. The cubic root of 4331640 is about 163.0112027630.

Adding to 4331640 its reverse (461334), we get a palindrome (4792974).

The spelling of 4331640 in words is "four million, three hundred thirty-one thousand, six hundred forty".