620626 has 4 divisors (see below), whose sum is σ = 930942. Its totient is φ = 310312.

The previous prime is 620623. The next prime is 620639. The reversal of 620626 is 626026.

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., 319225 + 301401 = 565^2 + 549^2 .

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 620597 and 620606.

It is not an unprimeable number, because it can be changed into a prime (620623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155155 + ... + 155158.

2⁶²⁰⁶²⁶ is an apocalyptic number.

620626 is a deficient number, since it is larger than the sum of its proper divisors (310316).

620626 is a wasteful number, since it uses less digits than its factorization.

620626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310315.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 620626 is about 787.7981975100. The cubic root of 620626 is about 85.2988786412.

The spelling of 620626 in words is "six hundred twenty thousand, six hundred twenty-six".