636424 has 32 divisors (see below), whose sum is σ = 1296000. Its totient is φ = 292032.

The previous prime is 636421. The next prime is 636469. The reversal of 636424 is 424636.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (636421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8017 + ... + 8095.

It is an arithmetic number, because the mean of its divisors is an integer number (40500).

2⁶³⁶⁴²⁴ is an apocalyptic number.

It is an amenable number.

636424 is an abundant number, since it is smaller than the sum of its proper divisors (659576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

636424 is a wasteful number, since it uses less digits than its factorization.

636424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 153 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

The square root of 636424 is about 797.7618692317. The cubic root of 636424 is about 86.0165823442.

The spelling of 636424 in words is "six hundred thirty-six thousand, four hundred twenty-four".