400630346 has 8 divisors (see below), whose sum is σ = 601035204. Its totient is φ = 200285280.

The previous prime is 400630301. The next prime is 400630367. The reversal of 400630346 is 643036004.

It can be written as a sum of positive squares in 2 ways, for example, as 368832025 + 31798321 = 19205^2 + 5639^2 .

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

It is a Curzon number.

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 in 3 ways as a sum of consecutive naturals, for example, 10406 + ... + 30158.

Almost surely, 2^400630346 is an apocalyptic number.

400630346 is a deficient number, since it is larger than the sum of its proper divisors (200404858).

400630346 is a wasteful number, since it uses less digits than its factorization.

400630346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29896.

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 400630346 is about 20015.7524465107. The cubic root of 400630346 is about 737.1931323537.

The spelling of 400630346 in words is "four hundred million, six hundred thirty thousand, three hundred forty-six".