405244132 has 6 divisors (see below), whose sum is σ = 709177238. Its totient is φ = 202622064.

The previous prime is 405244129. The next prime is 405244139. The reversal of 405244132 is 231442504.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 217444516 + 187799616 = 14746^2 + 13704^2 .

It is a junction number, because it is equal to n+sod(n) for n = 405244097 and 405244106.

It is not an unprimeable number, because it can be changed into a prime (405244139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50655513 + ... + 50655520.

Almost surely, 2^405244132 is an apocalyptic number.

It is an amenable number.

405244132 is a deficient number, since it is larger than the sum of its proper divisors (303933106).

405244132 is a wasteful number, since it uses less digits than its factorization.

405244132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101311037 (or 101311035 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 405244132 is about 20130.6763920143. The cubic root of 405244132 is about 740.0122544842.

Adding to 405244132 its reverse (231442504), we get a palindrome (636686636).

It can be divided in two parts, 4052 and 44132, that added together give a palindrome (48184).

The spelling of 405244132 in words is "four hundred five million, two hundred forty-four thousand, one hundred thirty-two".