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397305 = 365109
BaseRepresentation
bin1100000111111111001
3202012000000
41200333321
5100203210
612303213
73243216
oct1407771
9665000
10397305
11251557
12171b09
1310babc
14a4b0d
157cac0
hex60ff9

397305 has 28 divisors (see below), whose sum is σ = 721380. Its totient is φ = 209952.

The previous prime is 397303. The next prime is 397337. The reversal of 397305 is 503793.

It can be written as a sum of positive squares in 2 ways, for example, as 210681 + 186624 = 459^2 + 432^2 .

It is not a de Polignac number, because 397305 - 21 = 397303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (397301) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3591 + ... + 3699.

2397305 is an apocalyptic number.

It is an amenable number.

397305 is a deficient number, since it is larger than the sum of its proper divisors (324075).

397305 is an equidigital number, since it uses as much as digits as its factorization.

397305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 2835, while the sum is 27.

The square root of 397305 is about 630.3213466162. The cubic root of 397305 is about 73.5147825327.

The spelling of 397305 in words is "three hundred ninety-seven thousand, three hundred five".

Divisors: 1 3 5 9 15 27 45 81 109 135 243 327 405 545 729 981 1215 1635 2943 3645 4905 8829 14715 26487 44145 79461 132435 397305