400346343 has 12 divisors (see below), whose sum is σ = 578487208. Its totient is φ = 266801040.

The previous prime is 400346339. The next prime is 400346407. The reversal of 400346343 is 343643004.

It is not a de Polignac number, because 400346343 - 2² = 400346339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400346333) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 25653 + ... + 38193.

Almost surely, 2^400346343 is an apocalyptic number.

400346343 is a deficient number, since it is larger than the sum of its proper divisors (178140865).

400346343 is a wasteful number, since it uses less digits than its factorization.

400346343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16094 (or 16091 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

The square root of 400346343 is about 20008.6567015380. The cubic root of 400346343 is about 737.0188948011.

Adding to 400346343 its reverse (343643004), we get a palindrome (743989347).

It can be divided in two parts, 400346 and 343, that added together give a square (400689 = 633²).

The spelling of 400346343 in words is "four hundred million, three hundred forty-six thousand, three hundred forty-three".