400222600 has 48 divisors (see below), whose sum is σ = 939778020. Its totient is φ = 158496000.

The previous prime is 400222579. The next prime is 400222633. The reversal of 400222600 is 6222004.

It can be written as a sum of positive squares in 6 ways, for example, as 116165284 + 284057316 = 10778^2 + 16854^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10294 + ... + 30106.

Almost surely, 2^400222600 is an apocalyptic number.

400222600 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400222600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (469889010).

400222600 is an abundant number, since it is smaller than the sum of its proper divisors (539555420).

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

400222600 is a wasteful number, since it uses less digits than its factorization.

400222600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19930 (or 19921 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400222600 is about 20005.5642259847. The cubic root of 400222600 is about 736.9429519508.

Adding to 400222600 its reverse (6222004), we get a palindrome (406444604).

The spelling of 400222600 in words is "four hundred million, two hundred twenty-two thousand, six hundred".