400347 has 6 divisors (see below), whose sum is σ = 578292. Its totient is φ = 266892.

The previous prime is 400339. The next prime is 400381. The reversal of 400347 is 743004.

It is not a de Polignac number, because 400347 - 2³ = 400339 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 400347.

It is not an unprimeable number, because it can be changed into a prime (400307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22233 + ... + 22250.

It is an arithmetic number, because the mean of its divisors is an integer number (96382).

2⁴⁰⁰³⁴⁷ is an apocalyptic number.

400347 is a deficient number, since it is larger than the sum of its proper divisors (177945).

400347 is a wasteful number, since it uses less digits than its factorization.

400347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44489 (or 44486 counting only the distinct ones).

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

The square root of 400347 is about 632.7298001517. The cubic root of 400347 is about 73.7019297970.

It can be divided in two parts, 400 and 347, that added together give a palindrome (747).

The spelling of 400347 in words is "four hundred thousand, three hundred forty-seven", and thus it is an iban number.