405040226 has 16 divisors (see below), whose sum is σ = 613066104. Its totient is φ = 200690304.

The previous prime is 405040217. The next prime is 405040241. The reversal of 405040226 is 622040504.

It can be written as a sum of positive squares in 4 ways, for example, as 257442025 + 147598201 = 16045^2 + 12149^2 .

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 in 7 ways as a sum of consecutive naturals, for example, 232856 + ... + 234588.

Almost surely, 2^405040226 is an apocalyptic number.

405040226 is a deficient number, since it is larger than the sum of its proper divisors (208025878).

405040226 is a wasteful number, since it uses less digits than its factorization.

405040226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2725.

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

The square root of 405040226 is about 20125.6111956879. The cubic root of 405040226 is about 739.8881167590. Note that the first 3 decimals are identical.

The spelling of 405040226 in words is "four hundred five million, forty thousand, two hundred twenty-six".