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278068 = 2279931
BaseRepresentation
bin1000011111000110100
3112010102211
41003320310
532344233
65543204
72235460
oct1037064
9463384
10278068
1117aa0a
12114b04
139974b
14734a0
15575cd
hex43e34

278068 has 12 divisors (see below), whose sum is σ = 556192. Its totient is φ = 119160.

The previous prime is 278063. The next prime is 278071. The reversal of 278068 is 860872.

278068 is nontrivially palindromic in base 16.

278068 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4938 + ... + 4993.

2278068 is an apocalyptic number.

278068 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

278068 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

278068 is a wasteful number, since it uses less digits than its factorization.

278068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9942 (or 9940 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 278068 is about 527.3215337913. The cubic root of 278068 is about 65.2705097419.

The spelling of 278068 in words is "two hundred seventy-eight thousand, sixty-eight".

Divisors: 1 2 4 7 14 28 9931 19862 39724 69517 139034 278068