240640443 has 8 divisors (see below), whose sum is σ = 356504400. Its totient is φ = 160426944.

The previous prime is 240640417. The next prime is 240640447. The reversal of 240640443 is 344046042.

It is not a de Polignac number, because 240640443 - 2¹⁷ = 240509371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8912609 = 240640443 / (2 + 4 + 0 + 6 + 4 + 0 + 4 + 4 + 3).

It is not an unprimeable number, because it can be changed into a prime (240640447) 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, 4456278 + ... + 4456331.

It is an arithmetic number, because the mean of its divisors is an integer number (44563050).

Almost surely, 2^240640443 is an apocalyptic number.

240640443 is a deficient number, since it is larger than the sum of its proper divisors (115863957).

240640443 is an equidigital number, since it uses as much as digits as its factorization.

240640443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8912618 (or 8912612 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 240640443 is about 15512.5898224636. The cubic root of 240640443 is about 621.9987894711.

Adding to 240640443 its reverse (344046042), we get a palindrome (584686485).

It can be divided in two parts, 2406 and 40443, that added together give a square (42849 = 207²).

The spelling of 240640443 in words is "two hundred forty million, six hundred forty thousand, four hundred forty-three".