43870385 has 8 divisors (see below), whose sum is σ = 56694120. Its totient is φ = 32396544.

The previous prime is 43870381. The next prime is 43870391. The reversal of 43870385 is 58307834.

It is a happy number.

43870385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 889249 + 42981136 = 943^2 + 6556^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43870385 - 2² = 43870381 is a prime.

It is a super-2 number, since 2×43870385² = 3849221360096450, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (43870381) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 337400 + ... + 337529.

It is an arithmetic number, because the mean of its divisors is an integer number (7086765).

Almost surely, 2^43870385 is an apocalyptic number.

It is an amenable number.

43870385 is a deficient number, since it is larger than the sum of its proper divisors (12823735).

43870385 is a wasteful number, since it uses less digits than its factorization.

43870385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674947.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 43870385 is about 6623.4722766839. The cubic root of 43870385 is about 352.6878364458.

The spelling of 43870385 in words is "forty-three million, eight hundred seventy thousand, three hundred eighty-five".