400218334 has 4 divisors (see below), whose sum is σ = 600327504. Its totient is φ = 200109166.

The previous prime is 400218311. The next prime is 400218359. The reversal of 400218334 is 433812004.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 400218299 and 400218308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100054582 + ... + 100054585.

It is an arithmetic number, because the mean of its divisors is an integer number (150081876).

Almost surely, 2^400218334 is an apocalyptic number.

400218334 is a deficient number, since it is larger than the sum of its proper divisors (200109170).

400218334 is a wasteful number, since it uses less digits than its factorization.

400218334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200109169.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 400218334 is about 20005.4576053636. The cubic root of 400218334 is about 736.9403335665.

The spelling of 400218334 in words is "four hundred million, two hundred eighteen thousand, three hundred thirty-four".