400222213440 has 112 divisors (see below), whose sum is σ = 1452234913152. Its totient is φ = 91479361536.

The previous prime is 400222213403. The next prime is 400222213451. The reversal of 400222213440 is 44312222004.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 400222213440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29771719 + ... + 29785158.

Almost surely, 2^400222213440 is an apocalyptic number.

400222213440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400222213440 is an abundant number, since it is smaller than the sum of its proper divisors (1052012699712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400222213440 is a wasteful number, since it uses less digits than its factorization.

400222213440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59556904 (or 59556894 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 400222213440 its reverse (44312222004), we get a palindrome (444534435444).

The spelling of 400222213440 in words is "four hundred billion, two hundred twenty-two million, two hundred thirteen thousand, four hundred forty".