40431445 has 4 divisors (see below), whose sum is σ = 48517740. Its totient is φ = 32345152.

The previous prime is 40431439. The next prime is 40431467. The reversal of 40431445 is 54413404.

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 18818244 + 21613201 = 4338^2 + 4649^2 .

It is a cyclic number.

It is not a de Polignac number, because 40431445 - 2³ = 40431437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4043140 + ... + 4043149.

It is an arithmetic number, because the mean of its divisors is an integer number (12129435).

Almost surely, 2^40431445 is an apocalyptic number.

It is an amenable number.

40431445 is a deficient number, since it is larger than the sum of its proper divisors (8086295).

40431445 is an equidigital number, since it uses as much as digits as its factorization.

40431445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8086294.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 40431445 is about 6358.5725599383. The cubic root of 40431445 is about 343.2203957149.

Adding to 40431445 its reverse (54413404), we get a palindrome (94844849).

The spelling of 40431445 in words is "forty million, four hundred thirty-one thousand, four hundred forty-five".