43820745 has 16 divisors (see below), whose sum is σ = 73803840. Its totient is φ = 22140864.

The previous prime is 43820737. The next prime is 43820801. The reversal of 43820745 is 54702834.

43820745 = T₁₃₇₃ + T₁₃₇₄ + ... + T₁₄₁₇.

43820745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43820745 - 2³ = 43820737 is a prime.

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, 76594 + ... + 77163.

It is an arithmetic number, because the mean of its divisors is an integer number (4612740).

Almost surely, 2^43820745 is an apocalyptic number.

It is an amenable number.

43820745 is a deficient number, since it is larger than the sum of its proper divisors (29983095).

43820745 is a wasteful number, since it uses less digits than its factorization.

43820745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153784.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 43820745 is about 6619.7239368421. The cubic root of 43820745 is about 352.5547623788.

The spelling of 43820745 in words is "forty-three million, eight hundred twenty thousand, seven hundred forty-five".