400346344 has 16 divisors (see below), whose sum is σ = 757294020. Its totient is φ = 198401280.

The previous prime is 400346339. The next prime is 400346407. The reversal of 400346344 is 443643004.

It can be written as a sum of positive squares in 2 ways, for example, as 350812900 + 49533444 = 18730^2 + 7038^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220527 + ... + 222334.

Almost surely, 2^400346344 is an apocalyptic number.

It is an amenable number.

400346344 is a deficient number, since it is larger than the sum of its proper divisors (356947676).

400346344 is a wasteful number, since it uses less digits than its factorization.

400346344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442980 (or 442976 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

The square root of 400346344 is about 20008.6567265271. The cubic root of 400346344 is about 737.0188954147.

Adding to 400346344 its reverse (443643004), we get a palindrome (843989348).

The spelling of 400346344 in words is "four hundred million, three hundred forty-six thousand, three hundred forty-four".