40400343 has 8 divisors (see below), whose sum is σ = 59852400. Its totient is φ = 26933544.

The previous prime is 40400323. The next prime is 40400357. The reversal of 40400343 is 34300404.

It is not a de Polignac number, because 40400343 - 2⁹ = 40399831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400323) 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, 748128 + ... + 748181.

It is an arithmetic number, because the mean of its divisors is an integer number (7481550).

Almost surely, 2^40400343 is an apocalyptic number.

40400343 is a deficient number, since it is larger than the sum of its proper divisors (19452057).

40400343 is a wasteful number, since it uses less digits than its factorization.

40400343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496318 (or 1496312 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 40400343 is about 6356.1264147278. The cubic root of 40400343 is about 343.1323653948.

Adding to 40400343 its reverse (34300404), we get a palindrome (74700747).

The spelling of 40400343 in words is "forty million, four hundred thousand, three hundred forty-three".