6361640 has 32 divisors (see below), whose sum is σ = 14419080. Its totient is φ = 2525952.

The previous prime is 6361627. The next prime is 6361651. The reversal of 6361640 is 461636.

It can be written as a sum of positive squares in 4 ways, for example, as 2208196 + 4153444 = 1486^2 + 2038^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5774 + ... + 6786.

Almost surely, 2^6361640 is an apocalyptic number.

It is an amenable number.

6361640 is an abundant number, since it is smaller than the sum of its proper divisors (8057440).

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

6361640 is a wasteful number, since it uses less digits than its factorization.

6361640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181 (or 1177 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 6361640 is about 2522.2291727755. The cubic root of 6361640 is about 185.2918694514.

The spelling of 6361640 in words is "six million, three hundred sixty-one thousand, six hundred forty".