405509434 has 16 divisors (see below), whose sum is σ = 679746816. Its totient is φ = 179826400.

The previous prime is 405509431. The next prime is 405509459. The reversal of 405509434 is 434905504.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 405509434.

It is not an unprimeable number, because it can be changed into a prime (405509431) 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, 223882 + ... + 225685.

It is an arithmetic number, because the mean of its divisors is an integer number (42484176).

Almost surely, 2^405509434 is an apocalyptic number.

405509434 is a deficient number, since it is larger than the sum of its proper divisors (274237382).

405509434 is a wasteful number, since it uses less digits than its factorization.

405509434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449621.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 405509434 is about 20137.2648093032. The cubic root of 405509434 is about 740.1737076988.

The spelling of 405509434 in words is "four hundred five million, five hundred nine thousand, four hundred thirty-four".