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641004 = 223713587
BaseRepresentation
bin10011100011111101100
31012120021220
42130133230
5131003004
621423340
75306550
oct2343754
91176256
10641004
113a8661
1226ab50
131959c0
14129860
15c9dd9
hex9c7ec

641004 has 48 divisors (see below), whose sum is σ = 1843968. Its totient is φ = 168768.

The previous prime is 640993. The next prime is 641051. The reversal of 641004 is 400146.

It is a super-2 number, since 2×6410042 = 821772256032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

641004 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 15 ways as a sum of consecutive naturals, for example, 799 + ... + 1385.

It is an arithmetic number, because the mean of its divisors is an integer number (38416).

2641004 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 641004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (921984).

641004 is an abundant number, since it is smaller than the sum of its proper divisors (1202964).

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

641004 is a wasteful number, since it uses less digits than its factorization.

641004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 641004 is about 800.6272540952. The cubic root of 641004 is about 86.2224276496. Note that the first 3 decimals are identical.

The spelling of 641004 in words is "six hundred forty-one thousand, four".

Divisors: 1 2 3 4 6 7 12 13 14 21 26 28 39 42 52 78 84 91 156 182 273 364 546 587 1092 1174 1761 2348 3522 4109 7044 7631 8218 12327 15262 16436 22893 24654 30524 45786 49308 53417 91572 106834 160251 213668 320502 641004