405803834 has 4 divisors (see below), whose sum is σ = 608705754. Its totient is φ = 202901916.

The previous prime is 405803807. The next prime is 405803887. The reversal of 405803834 is 438308504.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 394141609 + 11662225 = 19853^2 + 3415^2 .

It is a junction number, because it is equal to n+sod(n) for n = 405803794 and 405803803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101450957 + ... + 101450960.

Almost surely, 2^405803834 is an apocalyptic number.

405803834 is a deficient number, since it is larger than the sum of its proper divisors (202901920).

405803834 is a wasteful number, since it uses less digits than its factorization.

405803834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202901919.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 405803834 is about 20144.5733139225. The cubic root of 405803834 is about 740.3527864978.

The spelling of 405803834 in words is "four hundred five million, eight hundred three thousand, eight hundred thirty-four".