43440690 has 32 divisors (see below), whose sum is σ = 106479360. Its totient is φ = 11337344.

The previous prime is 43440679. The next prime is 43440739. The reversal of 43440690 is 9604434.

43440690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×43440690² = 3774187095352200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13995 + ... + 16814.

It is an arithmetic number, because the mean of its divisors is an integer number (3327480).

Almost surely, 2^43440690 is an apocalyptic number.

43440690 is an abundant number, since it is smaller than the sum of its proper divisors (63038670).

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

43440690 is a wasteful number, since it uses less digits than its factorization.

43440690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30866.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 43440690 is about 6590.9551659832. The cubic root of 43440690 is about 351.5325719313.

The spelling of 43440690 in words is "forty-three million, four hundred forty thousand, six hundred ninety".