636622 has 16 divisors (see below), whose sum is σ = 1121760. Its totient is φ = 265248.

The previous prime is 636619. The next prime is 636631. The reversal of 636622 is 226636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97 + ... + 1132.

It is an arithmetic number, because the mean of its divisors is an integer number (70110).

2⁶³⁶⁶²² is an apocalyptic number.

636622 is a deficient number, since it is larger than the sum of its proper divisors (485138).

636622 is a wasteful number, since it uses less digits than its factorization.

636622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275.

The product of its digits is 2592, while the sum is 25.

The square root of 636622 is about 797.8859567632. The cubic root of 636622 is about 86.0255017215.

The spelling of 636622 in words is "six hundred thirty-six thousand, six hundred twenty-two".