635971340 has 24 divisors (see below), whose sum is σ = 1336013952. Its totient is φ = 254298240.

The previous prime is 635971339. The next prime is 635971351. The reversal of 635971340 is 43179536.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 635971294 and 635971303.

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, 105200 + ... + 111080.

It is an arithmetic number, because the mean of its divisors is an integer number (55667248).

Almost surely, 2^635971340 is an apocalyptic number.

It is an amenable number.

635971340 is an abundant number, since it is smaller than the sum of its proper divisors (700042612).

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

635971340 is a wasteful number, since it uses less digits than its factorization.

635971340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11297 (or 11295 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 635971340 is about 25218.4721979742. The cubic root of 635971340 is about 859.9618425471.

The spelling of 635971340 in words is "six hundred thirty-five million, nine hundred seventy-one thousand, three hundred forty".