400740344 has 16 divisors (see below), whose sum is σ = 756874800. Its totient is φ = 198907072.

The previous prime is 400740313. The next prime is 400740407. The reversal of 400740344 is 443047004.

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 3 ways as a sum of consecutive naturals, for example, 181724 + ... + 183915.

It is an arithmetic number, because the mean of its divisors is an integer number (47304675).

Almost surely, 2^400740344 is an apocalyptic number.

It is an amenable number.

400740344 is a deficient number, since it is larger than the sum of its proper divisors (356134456).

400740344 is a wasteful number, since it uses less digits than its factorization.

400740344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365782 (or 365778 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 400740344 is about 20018.5000437096. The cubic root of 400740344 is about 737.2605946671.

Adding to 400740344 its reverse (443047004), we get a palindrome (843787348).

The spelling of 400740344 in words is "four hundred million, seven hundred forty thousand, three hundred forty-four".