636764340 has 24 divisors (see below), whose sum is σ = 1782940320. Its totient is φ = 169803808.

The previous prime is 636764333. The next prime is 636764351. The reversal of 636764340 is 43467636.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5306310 + ... + 5306429.

It is an arithmetic number, because the mean of its divisors is an integer number (74289180).

Almost surely, 2^636764340 is an apocalyptic number.

636764340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

636764340 is an abundant number, since it is smaller than the sum of its proper divisors (1146175980).

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

636764340 is a wasteful number, since it uses less digits than its factorization.

636764340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10612751 (or 10612749 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 39.

The square root of 636764340 is about 25234.1899017979. The cubic root of 636764340 is about 860.3191262017.

It can be divided in two parts, 6367 and 64340, that added together give a palindrome (70707).

The spelling of 636764340 in words is "six hundred thirty-six million, seven hundred sixty-four thousand, three hundred forty".