43640252 has 12 divisors (see below), whose sum is σ = 77995680. Its totient is φ = 21355776.

The previous prime is 43640251. The next prime is 43640287. The reversal of 43640252 is 25204634.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43640251) 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, 115877 + ... + 116252.

It is an arithmetic number, because the mean of its divisors is an integer number (6499640).

Almost surely, 2^43640252 is an apocalyptic number.

It is an amenable number.

43640252 is a deficient number, since it is larger than the sum of its proper divisors (34355428).

43640252 is a wasteful number, since it uses less digits than its factorization.

43640252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232180 (or 232178 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 43640252 is about 6606.0768993405. The cubic root of 43640252 is about 352.0700510549.

Adding to 43640252 its reverse (25204634), we get a palindrome (68844886).

The spelling of 43640252 in words is "forty-three million, six hundred forty thousand, two hundred fifty-two".