641208436 has 12 divisors (see below), whose sum is σ = 1224125280. Its totient is φ = 291458360.

The previous prime is 641208427. The next prime is 641208437. The reversal of 641208436 is 634802146.

It is a super-2 number, since 2×641208436² = 822296516795132192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641208437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7286416 + ... + 7286503.

It is an arithmetic number, because the mean of its divisors is an integer number (102010440).

Almost surely, 2^641208436 is an apocalyptic number.

It is an amenable number.

641208436 is a deficient number, since it is larger than the sum of its proper divisors (582916844).

641208436 is a wasteful number, since it uses less digits than its factorization.

641208436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14572934 (or 14572932 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 641208436 is about 25322.0938312771. The cubic root of 641208436 is about 862.3159300818.

The spelling of 641208436 in words is "six hundred forty-one million, two hundred eight thousand, four hundred thirty-six".