400034520218 has 8 divisors (see below), whose sum is σ = 600402898260. Its totient is φ = 199900220800.

The previous prime is 400034520209. The next prime is 400034520257. The reversal of 400034520218 is 812025430004.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 343791077569 + 56243442649 = 586337^2 + 237157^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58515383 + ... + 58522218.

Almost surely, 2^400034520218 is an apocalyptic number.

400034520218 is a deficient number, since it is larger than the sum of its proper divisors (200368378042).

400034520218 is a wasteful number, since it uses less digits than its factorization.

400034520218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117039312.

The product of its (nonzero) digits is 7680, while the sum is 29.

The spelling of 400034520218 in words is "four hundred billion, thirty-four million, five hundred twenty thousand, two hundred eighteen".