400443252 has 96 divisors (see below), whose sum is σ = 1069649280. Its totient is φ = 115476480.

The previous prime is 400443247. The next prime is 400443287. The reversal of 400443252 is 252344004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278728 + ... + 280160.

It is an arithmetic number, because the mean of its divisors is an integer number (11142180).

Almost surely, 2^400443252 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 400443252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534824640).

400443252 is an abundant number, since it is smaller than the sum of its proper divisors (669206028).

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

400443252 is a wasteful number, since it uses less digits than its factorization.

400443252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553 (or 1551 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 400443252 is about 20011.0782318195. The cubic root of 400443252 is about 737.0783583157.

Adding to 400443252 its reverse (252344004), we get a palindrome (652787256).

The spelling of 400443252 in words is "four hundred million, four hundred forty-three thousand, two hundred fifty-two".