40143405 has 16 divisors (see below), whose sum is σ = 65597184. Its totient is φ = 20953920.

The previous prime is 40143403. The next prime is 40143437. The reversal of 40143405 is 50434104.

It is not a de Polignac number, because 40143405 - 2¹ = 40143403 is a prime.

It is a super-2 number, since 2×40143405² = 3222985929988050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40143403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27766 + ... + 29175.

It is an arithmetic number, because the mean of its divisors is an integer number (4099824).

Almost surely, 2^40143405 is an apocalyptic number.

It is an amenable number.

40143405 is a deficient number, since it is larger than the sum of its proper divisors (25453779).

40143405 is a wasteful number, since it uses less digits than its factorization.

40143405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56996.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40143405 is about 6335.8823379226. The cubic root of 40143405 is about 342.4034003951.

Adding to 40143405 its reverse (50434104), we get a palindrome (90577509).

The spelling of 40143405 in words is "forty million, one hundred forty-three thousand, four hundred five".