400144344 has 64 divisors (see below), whose sum is σ = 1030514400. Its totient is φ = 129383424.

The previous prime is 400144333. The next prime is 400144357. The reversal of 400144344 is 443441004.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494212 + ... + 495020.

Almost surely, 2^400144344 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 400144344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (515257200).

400144344 is an abundant number, since it is smaller than the sum of its proper divisors (630370056).

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

400144344 is a wasteful number, since it uses less digits than its factorization.

400144344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412 (or 1408 counting only the distinct ones).

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

The square root of 400144344 is about 20003.6082745089. The cubic root of 400144344 is about 736.8949170432.

Adding to 400144344 its reverse (443441004), we get a palindrome (843585348).

The spelling of 400144344 in words is "four hundred million, one hundred forty-four thousand, three hundred forty-four".