636412 has 36 divisors (see below), whose sum is σ = 1378944. Its totient is φ = 255360.

The previous prime is 636409. The next prime is 636421. The reversal of 636412 is 214636.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3237 + ... + 3427.

It is an arithmetic number, because the mean of its divisors is an integer number (38304).

2⁶³⁶⁴¹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (689472).

636412 is an abundant number, since it is smaller than the sum of its proper divisors (742532).

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

636412 is a wasteful number, since it uses less digits than its factorization.

636412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 217 counting only the distinct ones).

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

The square root of 636412 is about 797.7543481549. The cubic root of 636412 is about 86.0160417164.

The spelling of 636412 in words is "six hundred thirty-six thousand, four hundred twelve".