578722 has 4 divisors (see below), whose sum is σ = 868086. Its totient is φ = 289360.

The previous prime is 578719. The next prime is 578729. The reversal of 578722 is 227875.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 349281 + 229441 = 591^2 + 479^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (578729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144679 + ... + 144682.

2⁵⁷⁸⁷²² is an apocalyptic number.

578722 is a deficient number, since it is larger than the sum of its proper divisors (289364).

578722 is a wasteful number, since it uses less digits than its factorization.

578722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289363.

The product of its digits is 7840, while the sum is 31.

The square root of 578722 is about 760.7377997707. The cubic root of 578722 is about 83.3342115463.

It can be divided in two parts, 578 and 722, that multiplied together give a square (417316 = 646²).

The spelling of 578722 in words is "five hundred seventy-eight thousand, seven hundred twenty-two".