405342420 has 48 divisors (see below), whose sum is σ = 1297097088. Its totient is φ = 92649600.

The previous prime is 405342361. The next prime is 405342433. The reversal of 405342420 is 24243504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482131 + ... + 482970.

It is an arithmetic number, because the mean of its divisors is an integer number (27022856).

Almost surely, 2^405342420 is an apocalyptic number.

It is an amenable number.

405342420 is an abundant number, since it is smaller than the sum of its proper divisors (891754668).

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

405342420 is a wasteful number, since it uses less digits than its factorization.

405342420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965120 (or 965118 counting only the distinct ones).

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

The square root of 405342420 is about 20133.1174933243. The cubic root of 405342420 is about 740.0720772257.

Adding to 405342420 its reverse (24243504), we get a palindrome (429585924).

The spelling of 405342420 in words is "four hundred five million, three hundred forty-two thousand, four hundred twenty".