43740018 has 24 divisors (see below), whose sum is σ = 108308928. Its totient is φ = 12497112.

The previous prime is 43740017. The next prime is 43740023. The reversal of 43740018 is 81004734.

It is a junction number, because it is equal to n+sod(n) for n = 43739973 and 43740000.

It is not an unprimeable number, because it can be changed into a prime (43740017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173446 + ... + 173697.

It is an arithmetic number, because the mean of its divisors is an integer number (4512872).

Almost surely, 2^43740018 is an apocalyptic number.

43740018 is an abundant number, since it is smaller than the sum of its proper divisors (64568910).

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

43740018 is a wasteful number, since it uses less digits than its factorization.

43740018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347158 (or 347155 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 43740018 is about 6613.6236663421. The cubic root of 43740018 is about 352.3381360369.

The spelling of 43740018 in words is "forty-three million, seven hundred forty thousand, eighteen".