Search a number
-
+
276388 = 2279871
BaseRepresentation
bin1000011011110100100
3112001010121
41003132210
532321023
65531324
72230540
oct1033644
9461117
10276388
11179722
12113b44
1398a58
1472a20
1556d5d
hex437a4

276388 has 12 divisors (see below), whose sum is σ = 552832. Its totient is φ = 118440.

The previous prime is 276373. The next prime is 276389. The reversal of 276388 is 883672.

It is a happy number.

276388 is an admirable number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (276389) by changing a digit.

276388 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 3 ways as a sum of consecutive naturals, for example, 4908 + ... + 4963.

2276388 is an apocalyptic number.

276388 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

276388 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.

276388 is a wasteful number, since it uses less digits than its factorization.

276388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9882 (or 9880 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 276388 is about 525.7261644621. The cubic root of 276388 is about 65.1387961164.

The spelling of 276388 in words is "two hundred seventy-six thousand, three hundred eighty-eight".

Divisors: 1 2 4 7 14 28 9871 19742 39484 69097 138194 276388