405115432 has 8 divisors (see below), whose sum is σ = 759591450. Its totient is φ = 202557712.

The previous prime is 405115429. The next prime is 405115441. The reversal of 405115432 is 234511504.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 225180036 + 179935396 = 15006^2 + 13414^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 405115397 and 405115406.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25319707 + ... + 25319722.

Almost surely, 2^405115432 is an apocalyptic number.

It is an amenable number.

405115432 is a deficient number, since it is larger than the sum of its proper divisors (354476018).

405115432 is a wasteful number, since it uses less digits than its factorization.

405115432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50639435 (or 50639431 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 405115432 is about 20127.4795242723. The cubic root of 405115432 is about 739.9339069288.

Adding to 405115432 its reverse (234511504), we get a palindrome (639626936).

The spelling of 405115432 in words is "four hundred five million, one hundred fifteen thousand, four hundred thirty-two".