43646397 has 8 divisors (see below), whose sum is σ = 58261056. Its totient is φ = 29064672.

The previous prime is 43646381. The next prime is 43646431. The reversal of 43646397 is 79364634.

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

It is not a de Polignac number, because 43646397 - 2⁴ = 43646381 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43646797) 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, 4953 + ... + 10574.

It is an arithmetic number, because the mean of its divisors is an integer number (7282632).

Almost surely, 2^43646397 is an apocalyptic number.

It is an amenable number.

43646397 is a deficient number, since it is larger than the sum of its proper divisors (14614659).

43646397 is a wasteful number, since it uses less digits than its factorization.

43646397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16467.

The product of its digits is 326592, while the sum is 42.

The square root of 43646397 is about 6606.5419850327. The cubic root of 43646397 is about 352.0865753173.

The spelling of 43646397 in words is "forty-three million, six hundred forty-six thousand, three hundred ninety-seven".