636149284 has 9 divisors (see below), whose sum is σ = 1113349531. Its totient is φ = 318049420.

The previous prime is 636149257. The next prime is 636149309. The reversal of 636149284 is 482941636.

It is a happy number.

The square root of 636149284 is 25222.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 636149284.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 44139 + ... + 56749.

Almost surely, 2^636149284 is an apocalyptic number.

636149284 is the 25222-nd square number.

It is an amenable number.

636149284 is a deficient number, since it is larger than the sum of its proper divisors (477200247).

636149284 is an frugal number, since it uses more digits than its factorization.

636149284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25226 (or 12613 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The cubic root of 636149284 is about 860.0420404904.

The spelling of 636149284 in words is "six hundred thirty-six million, one hundred forty-nine thousand, two hundred eighty-four".