636380480 has 28 divisors (see below), whose sum is σ = 1515381780. Its totient is φ = 254552064.

The previous prime is 636380473. The next prime is 636380483. The reversal of 636380480 is 84083636.

It can be written as a sum of positive squares in 2 ways, for example, as 78287104 + 558093376 = 8848^2 + 23624^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636380483) 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, 994025 + ... + 994664.

Almost surely, 2^636380480 is an apocalyptic number.

It is an amenable number.

636380480 is an abundant number, since it is smaller than the sum of its proper divisors (879001300).

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

636380480 is a wasteful number, since it uses less digits than its factorization.

636380480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988706 (or 1988696 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 636380480 is about 25226.5828046527. The cubic root of 636380480 is about 860.1462163505.

The spelling of 636380480 in words is "six hundred thirty-six million, three hundred eighty thousand, four hundred eighty".