405620402 has 8 divisors (see below), whose sum is σ = 663742512. Its totient is φ = 184372900.

The previous prime is 405620401. The next prime is 405620407. The reversal of 405620402 is 204026504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (405620401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9218624 + ... + 9218667.

It is an arithmetic number, because the mean of its divisors is an integer number (82967814).

Almost surely, 2^405620402 is an apocalyptic number.

405620402 is a deficient number, since it is larger than the sum of its proper divisors (258122110).

405620402 is a wasteful number, since it uses less digits than its factorization.

405620402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18437304.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 405620402 is about 20140.0199106158. The cubic root of 405620402 is about 740.2412179284.

Adding to 405620402 its reverse (204026504), we get a palindrome (609646906).

The spelling of 405620402 in words is "four hundred five million, six hundred twenty thousand, four hundred two".