405402342 has 16 divisors (see below), whose sum is σ = 830580912. Its totient is φ = 131838080.

The previous prime is 405402341. The next prime is 405402367. The reversal of 405402342 is 243204504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405402341) 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, 823743 + ... + 824234.

It is an arithmetic number, because the mean of its divisors is an integer number (51911307).

Almost surely, 2^405402342 is an apocalyptic number.

405402342 is an abundant number, since it is smaller than the sum of its proper divisors (425178570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405402342 is a wasteful number, since it uses less digits than its factorization.

405402342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648023.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 405402342 is about 20134.6055834228. The cubic root of 405402342 is about 740.1085438539.

Adding to 405402342 its reverse (243204504), we get a palindrome (648606846).

The spelling of 405402342 in words is "four hundred five million, four hundred two thousand, three hundred forty-two".