43906145 has 8 divisors (see below), whose sum is σ = 54504360. Its totient is φ = 33913600.

The previous prime is 43906141. The next prime is 43906151. The reversal of 43906145 is 54160934.

It can be written as a sum of positive squares in 4 ways, for example, as 13512976 + 30393169 = 3676^2 + 5513^2 .

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

It is not a de Polignac number, because 43906145 - 2² = 43906141 is a prime.

It is a super-2 number, since 2×43906145² = 3855499137522050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43906141) 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, 151256 + ... + 151545.

It is an arithmetic number, because the mean of its divisors is an integer number (6813045).

Almost surely, 2^43906145 is an apocalyptic number.

It is an amenable number.

43906145 is a deficient number, since it is larger than the sum of its proper divisors (10598215).

43906145 is a wasteful number, since it uses less digits than its factorization.

43906145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302835.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 43906145 is about 6626.1712172264. The cubic root of 43906145 is about 352.7836390527.

The spelling of 43906145 in words is "forty-three million, nine hundred six thousand, one hundred forty-five".