406140343 has 8 divisors (see below), whose sum is σ = 470036480. Its totient is φ = 343713240.

The previous prime is 406140337. The next prime is 406140367. The reversal of 406140343 is 343041604.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 406140343 - 2¹³ = 406132151 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 (406140313) 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, 366663 + ... + 367768.

It is an arithmetic number, because the mean of its divisors is an integer number (58754560).

Almost surely, 2^406140343 is an apocalyptic number.

406140343 is a deficient number, since it is larger than the sum of its proper divisors (63896137).

406140343 is an equidigital number, since it uses as much as digits as its factorization.

406140343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734517.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 406140343 is about 20152.9239317772. The cubic root of 406140343 is about 740.5573734783.

Adding to 406140343 its reverse (343041604), we get a palindrome (749181947).

The spelling of 406140343 in words is "four hundred six million, one hundred forty thousand, three hundred forty-three".