400000344 has 32 divisors (see below), whose sum is σ = 1058825520. Its totient is φ = 125490176.

The previous prime is 400000333. The next prime is 400000357. The reversal of 400000344 is 443000004.

It is a congruent number.

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, 489789 + ... + 490604.

Almost surely, 2^400000344 is an apocalyptic number.

It is an amenable number.

400000344 is an abundant number, since it is smaller than the sum of its proper divisors (658825176).

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

400000344 is a wasteful number, since it uses less digits than its factorization.

400000344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980419 (or 980415 counting only the distinct ones).

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

The square root of 400000344 is about 20000.0085999982. The cubic root of 400000344 is about 736.8065109458.

Adding to 400000344 its reverse (443000004), we get a palindrome (843000348).

The spelling of 400000344 in words is "four hundred million, three hundred forty-four", and thus it is an aban number.