620656 has 10 divisors (see below), whose sum is σ = 1202552. Its totient is φ = 310320.

The previous prime is 620647. The next prime is 620657. The reversal of 620656 is 656026.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 620656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19380 + ... + 19411.

2⁶²⁰⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

620656 is a deficient number, since it is larger than the sum of its proper divisors (581896).

620656 is a wasteful number, since it uses less digits than its factorization.

620656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38799 (or 38793 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 620656 is about 787.8172376890. The cubic root of 620656 is about 85.3002530198.

The spelling of 620656 in words is "six hundred twenty thousand, six hundred fifty-six".