641304 has 32 divisors (see below), whose sum is σ = 1782000. Its totient is φ = 213696.

The previous prime is 641299. The next prime is 641317. The reversal of 641304 is 403146.

It is a super-2 number, since 2×641304² = 822541640832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1269 + ... + 1700.

2⁶⁴¹³⁰⁴ is an apocalyptic number.

It is an amenable number.

641304 is an abundant number, since it is smaller than the sum of its proper divisors (1140696).

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

641304 is a wasteful number, since it uses less digits than its factorization.

641304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984 (or 2974 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 641304 is about 800.8145852818. The cubic root of 641304 is about 86.2358767045.

The spelling of 641304 in words is "six hundred forty-one thousand, three hundred four".