662439 has 16 divisors (see below), whose sum is σ = 967680. Its totient is φ = 401280.

The previous prime is 662407. The next prime is 662443. The reversal of 662439 is 934266.

It is not a de Polignac number, because 662439 - 2⁵ = 662407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1372 + ... + 1790.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2⁶⁶²⁴³⁹ is an apocalyptic number.

662439 is a deficient number, since it is larger than the sum of its proper divisors (305241).

662439 is a wasteful number, since it uses less digits than its factorization.

662439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470.

The product of its digits is 7776, while the sum is 30.

The square root of 662439 is about 813.9035569403. The cubic root of 662439 is about 87.1729944008.

The spelling of 662439 in words is "six hundred sixty-two thousand, four hundred thirty-nine".