400743 has 12 divisors (see below), whose sum is σ = 661648. Its totient is φ = 228960.

The previous prime is 400739. The next prime is 400753. The reversal of 400743 is 347004.

It is not a de Polignac number, because 400743 - 2² = 400739 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 (400703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3118 + ... + 3243.

2⁴⁰⁰⁷⁴³ is an apocalyptic number.

400743 is a deficient number, since it is larger than the sum of its proper divisors (260905).

400743 is a wasteful number, since it uses less digits than its factorization.

400743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6374 (or 6371 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 400743 is about 633.0426525914. The cubic root of 400743 is about 73.7262223452.

Adding to 400743 its reverse (347004), we get a palindrome (747747).

The spelling of 400743 in words is "four hundred thousand, seven hundred forty-three", and thus it is an iban number.