578440 has 16 divisors (see below), whose sum is σ = 1301580. Its totient is φ = 231360.

The previous prime is 578419. The next prime is 578441. The reversal of 578440 is 44875.

It can be written as a sum of positive squares in 2 ways, for example, as 509796 + 68644 = 714^2 + 262^2 .

It is a junction number, because it is equal to n+sod(n) for n = 578399 and 578408.

It is not an unprimeable number, because it can be changed into a prime (578441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7191 + ... + 7270.

2⁵⁷⁸⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

578440 is an abundant number, since it is smaller than the sum of its proper divisors (723140).

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

578440 is a wasteful number, since it uses less digits than its factorization.

578440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14472 (or 14468 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 578440 is about 760.5524308028. The cubic root of 578440 is about 83.3206736324.

The spelling of 578440 in words is "five hundred seventy-eight thousand, four hundred forty".