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306040 = 23571093
BaseRepresentation
bin1001010101101111000
3120112210211
41022231320
534243130
610320504
72413150
oct1125570
9515724
10306040
11199a29
12129134
13a93b7
147d760
1560a2a
hex4ab78

306040 has 32 divisors (see below), whose sum is σ = 787680. Its totient is φ = 104832.

The previous prime is 306029. The next prime is 306041. The reversal of 306040 is 40603.

It is a self number, because there is not a number n which added to its sum of digits gives 306040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306041) by changing a digit.

306040 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 7 ways as a sum of consecutive naturals, for example, 267 + ... + 826.

It is an arithmetic number, because the mean of its divisors is an integer number (24615).

2306040 is an apocalyptic number.

It is an amenable number.

306040 is an abundant number, since it is smaller than the sum of its proper divisors (481640).

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

306040 is a wasteful number, since it uses less digits than its factorization.

306040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 306040 is about 553.2088213324. The cubic root of 306040 is about 67.3895771172.

Adding to 306040 its reverse (40603), we get a palindrome (346643).

The spelling of 306040 in words is "three hundred six thousand, forty".

Divisors: 1 2 4 5 7 8 10 14 20 28 35 40 56 70 140 280 1093 2186 4372 5465 7651 8744 10930 15302 21860 30604 38255 43720 61208 76510 153020 306040