400340222 has 16 divisors (see below), whose sum is σ = 649202640. Its totient is φ = 184508928.

The previous prime is 400340201. The next prime is 400340261. The reversal of 400340222 is 222043004.

It is a self number, because there is not a number n which added to its sum of digits gives 400340222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140963 + ... + 143774.

It is an arithmetic number, because the mean of its divisors is an integer number (40575165).

Almost surely, 2^400340222 is an apocalyptic number.

400340222 is a deficient number, since it is larger than the sum of its proper divisors (248862418).

400340222 is a wasteful number, since it uses less digits than its factorization.

400340222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284795.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 400340222 is about 20008.5037421592. The cubic root of 400340222 is about 737.0151386237.

Adding to 400340222 its reverse (222043004), we get a palindrome (622383226).

The spelling of 400340222 in words is "four hundred million, three hundred forty thousand, two hundred twenty-two".