40420343 has 4 divisors (see below), whose sum is σ = 40715520. Its totient is φ = 40125168.

The previous prime is 40420337. The next prime is 40420349. The reversal of 40420343 is 34302404.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40420337) and next prime (40420349).

It is a cyclic number.

It is not a de Polignac number, because 40420343 - 2¹⁶ = 40354807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40420349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147383 + ... + 147656.

It is an arithmetic number, because the mean of its divisors is an integer number (10178880).

Almost surely, 2^40420343 is an apocalyptic number.

40420343 is a deficient number, since it is larger than the sum of its proper divisors (295177).

40420343 is a wasteful number, since it uses less digits than its factorization.

40420343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295176.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 40420343 is about 6357.6995053242. The cubic root of 40420343 is about 343.1889780757.

Adding to 40420343 its reverse (34302404), we get a palindrome (74722747).

The spelling of 40420343 in words is "forty million, four hundred twenty thousand, three hundred forty-three".