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311340 = 22355189
BaseRepresentation
bin1001100000000101100
3120211002010
41030000230
534430330
610401220
72434461
oct1140054
9524063
10311340
111a2a07
12130210
13ab933
1481668
15623b0
hex4c02c

311340 has 24 divisors (see below), whose sum is σ = 871920. Its totient is φ = 83008.

The previous prime is 311329. The next prime is 311341. The reversal of 311340 is 43113.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (311341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2535 + ... + 2654.

It is an arithmetic number, because the mean of its divisors is an integer number (36330).

2311340 is an apocalyptic number.

311340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311340 is an abundant number, since it is smaller than the sum of its proper divisors (560580).

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

311340 is a wasteful number, since it uses less digits than its factorization.

311340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5201 (or 5199 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 311340 is about 557.9784942092. The cubic root of 311340 is about 67.7763703212.

Adding to 311340 its reverse (43113), we get a palindrome (354453).

The spelling of 311340 in words is "three hundred eleven thousand, three hundred forty", and thus it is an iban number.

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 5189 10378 15567 20756 25945 31134 51890 62268 77835 103780 155670 311340