636332890 has 8 divisors (see below), whose sum is σ = 1145399220. Its totient is φ = 254533152.

The previous prime is 636332869. The next prime is 636332891. The reversal of 636332890 is 98233636.

It can be written as a sum of positive squares in 2 ways, for example, as 594433161 + 41899729 = 24381^2 + 6473^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (636332891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31816635 + ... + 31816654.

Almost surely, 2^636332890 is an apocalyptic number.

636332890 is a deficient number, since it is larger than the sum of its proper divisors (509066330).

636332890 is a wasteful number, since it uses less digits than its factorization.

636332890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63633296.

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 636332890 is about 25225.6395359959. The cubic root of 636332890 is about 860.1247745767.

The spelling of 636332890 in words is "six hundred thirty-six million, three hundred thirty-two thousand, eight hundred ninety".