641368 has 32 divisors (see below), whose sum is σ = 1481760. Its totient is φ = 253440.

The previous prime is 641327. The next prime is 641371. The reversal of 641368 is 863146.

641368 is nontrivially palindromic in base 9.

It is a super-2 number, since 2×641368² = 822705822848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

641368 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288 + ... + 1168.

It is an arithmetic number, because the mean of its divisors is an integer number (46305).

2⁶⁴¹³⁶⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (740880).

641368 is an abundant number, since it is smaller than the sum of its proper divisors (840392).

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

641368 is a wasteful number, since it uses less digits than its factorization.

641368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907 (or 903 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 641368 is about 800.8545435970. The cubic root of 641368 is about 86.2387452933.

The spelling of 641368 in words is "six hundred forty-one thousand, three hundred sixty-eight".