620635 has 16 divisors (see below), whose sum is σ = 806400. Its totient is φ = 457056.

The previous prime is 620623. The next prime is 620639. The reversal of 620635 is 536026.

It is a cyclic number.

It is not a de Polignac number, because 620635 - 2⁵ = 620603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620639) 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, 4396 + ... + 4534.

It is an arithmetic number, because the mean of its divisors is an integer number (50400).

2⁶²⁰⁶³⁵ is an apocalyptic number.

620635 is a deficient number, since it is larger than the sum of its proper divisors (185765).

620635 is a wasteful number, since it uses less digits than its factorization.

620635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 620635 is about 787.8039096120. The cubic root of 620635 is about 85.2992909594.

It can be divided in two parts, 6206 and 35, that added together give a square (6241 = 79²).

The spelling of 620635 in words is "six hundred twenty thousand, six hundred thirty-five".