400344 has 32 divisors (see below), whose sum is σ = 1144320. Its totient is φ = 114336.

The previous prime is 400339. The next prime is 400381. The reversal of 400344 is 443004.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 400344.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1024 + ... + 1359.

It is an arithmetic number, because the mean of its divisors is an integer number (35760).

2⁴⁰⁰³⁴⁴ is an apocalyptic number.

It is an amenable number.

400344 is an abundant number, since it is smaller than the sum of its proper divisors (743976).

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

400344 is a wasteful number, since it uses less digits than its factorization.

400344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2399 (or 2395 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 400344 is about 632.7274294671. The cubic root of 400344 is about 73.7017457014.

Adding to 400344 its reverse (443004), we get a palindrome (843348).

The spelling of 400344 in words is "four hundred thousand, three hundred forty-four", and thus it is an iban number.