400220668 has 12 divisors (see below), whose sum is σ = 705025552. Its totient is φ = 198784800.

The previous prime is 400220663. The next prime is 400220671. The reversal of 400220668 is 866022004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400220663) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 330705 + ... + 331912.

Almost surely, 2^400220668 is an apocalyptic number.

It is an amenable number.

400220668 is a deficient number, since it is larger than the sum of its proper divisors (304804884).

400220668 is a wasteful number, since it uses less digits than its factorization.

400220668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662772 (or 662770 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 400220668 is about 20005.5159393603. The cubic root of 400220668 is about 736.9417661307.

The spelling of 400220668 in words is "four hundred million, two hundred twenty thousand, six hundred sixty-eight".