400006622 has 8 divisors (see below), whose sum is σ = 602345376. Its totient is φ = 199224832.

The previous prime is 400006603. The next prime is 400006643. The reversal of 400006622 is 226600004.

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

It is a junction number, because it is equal to n+sod(n) for n = 400006594 and 400006603.

It is a congruent number.

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, 388598 + ... + 389625.

It is an arithmetic number, because the mean of its divisors is an integer number (75293172).

Almost surely, 2^400006622 is an apocalyptic number.

400006622 is a deficient number, since it is larger than the sum of its proper divisors (202338754).

400006622 is a wasteful number, since it uses less digits than its factorization.

400006622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778482.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 400006622 is about 20000.1655493148. The cubic root of 400006622 is about 736.8103656484.

Adding to 400006622 its reverse (226600004), we get a palindrome (626606626).

The spelling of 400006622 in words is "four hundred million, six thousand, six hundred twenty-two".