400244900 has 72 divisors (see below), whose sum is σ = 952814016. Its totient is φ = 144726400.

The previous prime is 400244881. The next prime is 400244927. The reversal of 400244900 is 9442004.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215777 + ... + 217623.

It is an arithmetic number, because the mean of its divisors is an integer number (13233528).

Almost surely, 2^400244900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400244900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (476407008).

400244900 is an abundant number, since it is smaller than the sum of its proper divisors (552569116).

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

400244900 is a wasteful number, since it uses less digits than its factorization.

400244900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069 (or 2062 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 400244900 is about 20006.1215631616. The cubic root of 400244900 is about 736.9566389362.

Adding to 400244900 its reverse (9442004), we get a palindrome (409686904).

The spelling of 400244900 in words is "four hundred million, two hundred forty-four thousand, nine hundred".