405041402 has 8 divisors (see below), whose sum is σ = 607655412. Its totient is φ = 202489600.

The previous prime is 405041401. The next prime is 405041407. The reversal of 405041402 is 204140504.

It can be written as a sum of positive squares in 2 ways, for example, as 375545641 + 29495761 = 19379^2 + 5431^2 .

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 (405041401) 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, 7652 + ... + 29472.

Almost surely, 2^405041402 is an apocalyptic number.

405041402 is a deficient number, since it is larger than the sum of its proper divisors (202614010).

405041402 is a wasteful number, since it uses less digits than its factorization.

405041402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31104.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 405041402 is about 20125.6404121707. The cubic root of 405041402 is about 739.8888328258. Note that the first 4 decimals are identical.

Adding to 405041402 its reverse (204140504), we get a palindrome (609181906).

The spelling of 405041402 in words is "four hundred five million, forty-one thousand, four hundred two".