405239332 has 12 divisors (see below), whose sum is σ = 710565660. Its totient is φ = 202220576.

The previous prime is 405239321. The next prime is 405239333. The reversal of 405239332 is 233932504.

It can be written as a sum of positive squares in 2 ways, for example, as 380796196 + 24443136 = 19514^2 + 4944^2 .

It is a junction number, because it is equal to n+sod(n) for n = 405239294 and 405239303.

It is not an unprimeable number, because it can be changed into a prime (405239333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97483 + ... + 101554.

It is an arithmetic number, because the mean of its divisors is an integer number (59213805).

Almost surely, 2^405239332 is an apocalyptic number.

It is an amenable number.

405239332 is a deficient number, since it is larger than the sum of its proper divisors (305326328).

405239332 is a wasteful number, since it uses less digits than its factorization.

405239332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199550 (or 199548 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 405239332 is about 20130.5571706299. The cubic root of 405239332 is about 740.0093327287.

The spelling of 405239332 in words is "four hundred five million, two hundred thirty-nine thousand, three hundred thirty-two".