405305342 has 16 divisors (see below), whose sum is σ = 655372032. Its totient is φ = 186878880.

The previous prime is 405305339. The next prime is 405305413. The reversal of 405305342 is 243503504.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21092 + ... + 35432.

It is an arithmetic number, because the mean of its divisors is an integer number (40960752).

Almost surely, 2^405305342 is an apocalyptic number.

405305342 is a deficient number, since it is larger than the sum of its proper divisors (250066690).

405305342 is a wasteful number, since it uses less digits than its factorization.

405305342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15443.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 405305342 is about 20132.1966511357. The cubic root of 405305342 is about 740.0495109313.

Adding to 405305342 its reverse (243503504), we get a palindrome (648808846).

The spelling of 405305342 in words is "four hundred five million, three hundred five thousand, three hundred forty-two".