405243332 has 24 divisors (see below), whose sum is σ = 790066200. Its totient is φ = 180585216.

The previous prime is 405243323. The next prime is 405243337. The reversal of 405243332 is 233342504.

It can be written as a sum of positive squares in 4 ways, for example, as 10982596 + 394260736 = 3314^2 + 19856^2 .

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

It is not an unprimeable number, because it can be changed into a prime (405243337) 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, 132857 + ... + 135872.

It is an arithmetic number, because the mean of its divisors is an integer number (32919425).

Almost surely, 2^405243332 is an apocalyptic number.

It is an amenable number.

405243332 is a deficient number, since it is larger than the sum of its proper divisors (384822868).

405243332 is a wasteful number, since it uses less digits than its factorization.

405243332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268775 (or 268773 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 26.

The square root of 405243332 is about 20130.6565218326. The cubic root of 405243332 is about 740.0117675265.

Adding to 405243332 its reverse (233342504), we get a palindrome (638585836).

The spelling of 405243332 in words is "four hundred five million, two hundred forty-three thousand, three hundred thirty-two".