40343945 has 8 divisors (see below), whose sum is σ = 48892680. Its totient is φ = 31955200.

The previous prime is 40343929. The next prime is 40343951. The reversal of 40343945 is 54934304.

40343945 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 6285049 + 34058896 = 2507^2 + 5836^2 .

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

It is not a de Polignac number, because 40343945 - 2⁴ = 40343929 is a prime.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 39440 + ... + 40449.

It is an arithmetic number, because the mean of its divisors is an integer number (6111585).

Almost surely, 2^40343945 is an apocalyptic number.

It is an amenable number.

40343945 is a deficient number, since it is larger than the sum of its proper divisors (8548735).

40343945 is a wasteful number, since it uses less digits than its factorization.

40343945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79995.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 40343945 is about 6351.6883582241. The cubic root of 40343945 is about 342.9726225999.

The spelling of 40343945 in words is "forty million, three hundred forty-three thousand, nine hundred forty-five".