400704 has 28 divisors (see below), whose sum is σ = 1060704. Its totient is φ = 133504.

The previous prime is 400703. The next prime is 400711. The reversal of 400704 is 407004.

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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 852 + ... + 1235.

2⁴⁰⁰⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

400704 is an abundant number, since it is smaller than the sum of its proper divisors (660000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400704 is a wasteful number, since it uses less digits than its factorization.

400704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102 (or 2092 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 400704 is about 633.0118482303. The cubic root of 400704 is about 73.7238306079.

Subtracting from 400704 its sum of digits (15), we obtain a square (400689 = 633²).

Adding to 400704 its reverse (407004), we get a palindrome (807708).

The spelling of 400704 in words is "four hundred thousand, seven hundred four", and thus it is an iban number.