636849120 has 192 divisors, whose sum is σ = 2093285376. Its totient is φ = 162570240.

The previous prime is 636849119. The next prime is 636849133. The reversal of 636849120 is 21948636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1889592 + ... + 1889928.

It is an arithmetic number, because the mean of its divisors is an integer number (10902528).

Almost surely, 2^636849120 is an apocalyptic number.

636849120 is a gapful number since it is divisible by the number (60) 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 636849120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046642688).

636849120 is an abundant number, since it is smaller than the sum of its proper divisors (1456436256).

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

636849120 is a wasteful number, since it uses less digits than its factorization.

636849120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 636849120 is about 25235.8697096018. The cubic root of 636849120 is about 860.3573060087.

The spelling of 636849120 in words is "six hundred thirty-six million, eight hundred forty-nine thousand, one hundred twenty".