400580 has 12 divisors (see below), whose sum is σ = 841260. Its totient is φ = 160224.

The previous prime is 400579. The next prime is 400597. The reversal of 400580 is 85004.

400580 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 123904 + 276676 = 352^2 + 526^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9995 + ... + 10034.

It is an arithmetic number, because the mean of its divisors is an integer number (70105).

2⁴⁰⁰⁵⁸⁰ is an apocalyptic number.

It is an amenable number.

400580 is an abundant number, since it is smaller than the sum of its proper divisors (440680).

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

400580 is a wasteful number, since it uses less digits than its factorization.

400580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20038 (or 20036 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 400580 is about 632.9138961976. The cubic root of 400580 is about 73.7162250785.

Adding to 400580 its reverse (85004), we get a palindrome (485584).

It can be divided in two parts, 4005 and 80, that multiplied together give a triangular number (320400 = T₈₀₀).

The spelling of 400580 in words is "four hundred thousand, five hundred eighty".