641360 has 20 divisors (see below), whose sum is σ = 1491348. Its totient is φ = 256512.

The previous prime is 641327. The next prime is 641371. The reversal of 641360 is 63146.

641360 = T₁₈₄ + T₁₈₅ + ... + T₂₁₅.

It can be written as a sum of positive squares in 2 ways, for example, as 300304 + 341056 = 548^2 + 584^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×641360² = 822685299200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3929 + ... + 4088.

2⁶⁴¹³⁶⁰ is an apocalyptic number.

It is an amenable number.

641360 is an abundant number, since it is smaller than the sum of its proper divisors (849988).

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

641360 is a wasteful number, since it uses less digits than its factorization.

641360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8030 (or 8024 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 641360 is about 800.8495489166. The cubic root of 641360 is about 86.2383867302.

It can be divided in two parts, 641 and 360, that added together give a palindrome (1001).

The spelling of 641360 in words is "six hundred forty-one thousand, three hundred sixty".