636223896 has 320 divisors, whose sum is σ = 2283240960. Its totient is φ = 160704000.

The previous prime is 636223883. The next prime is 636223927. The reversal of 636223896 is 698322636.

636223896 is a `hidden beast` number, since 636 + 2 + 2 + 3 + 8 + 9 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2045581 + ... + 2045891.

It is an arithmetic number, because the mean of its divisors is an integer number (7135128).

Almost surely, 2^636223896 is an apocalyptic number.

636223896 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636223896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1141620480).

636223896 is an abundant number, since it is smaller than the sum of its proper divisors (1647017064).

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

636223896 is a wasteful number, since it uses less digits than its factorization.

636223896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 375 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 636223896 is about 25223.4790621754. The cubic root of 636223896 is about 860.0756630743.

The spelling of 636223896 in words is "six hundred thirty-six million, two hundred twenty-three thousand, eight hundred ninety-six".