405136474 has 4 divisors (see below), whose sum is σ = 607704714. Its totient is φ = 202568236.

The previous prime is 405136451. The next prime is 405136483. The reversal of 405136474 is 474631504.

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., 390260025 + 14876449 = 19755^2 + 3857^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 101284117 + ... + 101284120.

Almost surely, 2^405136474 is an apocalyptic number.

405136474 is a deficient number, since it is larger than the sum of its proper divisors (202568240).

405136474 is a wasteful number, since it uses less digits than its factorization.

405136474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202568239.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 405136474 is about 20128.0022356914. The cubic root of 405136474 is about 739.9467176148.

Adding to 405136474 its reverse (474631504), we get a palindrome (879767978).

The spelling of 405136474 in words is "four hundred five million, one hundred thirty-six thousand, four hundred seventy-four".