43628405 has 4 divisors (see below), whose sum is σ = 52354092. Its totient is φ = 34902720.

The previous prime is 43628363. The next prime is 43628407. The reversal of 43628405 is 50482634.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18957316 + 24671089 = 4354^2 + 4967^2 .

It is not a de Polignac number, because 43628405 - 2⁸ = 43628149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43628407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4362836 + ... + 4362845.

It is an arithmetic number, because the mean of its divisors is an integer number (13088523).

Almost surely, 2^43628405 is an apocalyptic number.

It is an amenable number.

43628405 is a deficient number, since it is larger than the sum of its proper divisors (8725687).

43628405 is an equidigital number, since it uses as much as digits as its factorization.

43628405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8725686.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 43628405 is about 6605.1801640833. The cubic root of 43628405 is about 352.0381894043.

The spelling of 43628405 in words is "forty-three million, six hundred twenty-eight thousand, four hundred five".