405630464 has 20 divisors (see below), whose sum is σ = 810469704. Its totient is φ = 202814976.

The previous prime is 405630457. The next prime is 405630469. The reversal of 405630464 is 464036504.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 405630464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405630469) by changing a digit.

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, 395612 + ... + 396635.

Almost surely, 2^405630464 is an apocalyptic number.

It is an amenable number.

405630464 is a deficient number, since it is larger than the sum of its proper divisors (404839240).

405630464 is an frugal number, since it uses more digits than its factorization.

405630464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792265 (or 792249 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 405630464 is about 20140.2697102099. The cubic root of 405630464 is about 740.2473387954.

Adding to 405630464 its reverse (464036504), we get a palindrome (869666968).

The spelling of 405630464 in words is "four hundred five million, six hundred thirty thousand, four hundred sixty-four".