400740 has 24 divisors (see below), whose sum is σ = 1122240. Its totient is φ = 106848.

The previous prime is 400739. The next prime is 400753. The reversal of 400740 is 47004.

It is a Harshad number since it is a multiple of its sum of digits (15).

400740 is a modest number, since divided by 740 gives 400 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3280 + ... + 3399.

It is an arithmetic number, because the mean of its divisors is an integer number (46760).

2⁴⁰⁰⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

400740 is an abundant number, since it is smaller than the sum of its proper divisors (721500).

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

400740 is a wasteful number, since it uses less digits than its factorization.

400740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6691 (or 6689 counting only the distinct ones).

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

The square root of 400740 is about 633.0402830784. The cubic root of 400740 is about 73.7260383709.

Adding to 400740 its reverse (47004), we get a palindrome (447744).

The spelling of 400740 in words is "four hundred thousand, seven hundred forty", and thus it is an iban number.