636632442 has 48 divisors (see below), whose sum is σ = 1394265600. Its totient is φ = 209933856.

The previous prime is 636632441. The next prime is 636632443. The reversal of 636632442 is 244236636.

It is an interprime number because it is at equal distance from previous prime (636632441) and next prime (636632443).

It is a junction number, because it is equal to n+sod(n) for n = 636632397 and 636632406.

It is not an unprimeable number, because it can be changed into a prime (636632441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 798388 + ... + 799184.

It is an arithmetic number, because the mean of its divisors is an integer number (29047200).

Almost surely, 2^636632442 is an apocalyptic number.

636632442 is an abundant number, since it is smaller than the sum of its proper divisors (757633158).

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

636632442 is a wasteful number, since it uses less digits than its factorization.

636632442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227 (or 1224 counting only the distinct ones).

The product of its digits is 124416, while the sum is 36.

The square root of 636632442 is about 25231.5762884525. The cubic root of 636632442 is about 860.2597205468.

The spelling of 636632442 in words is "six hundred thirty-six million, six hundred thirty-two thousand, four hundred forty-two".