276840 has 48 divisors (see below), whose sum is σ = 900900. Its totient is φ = 73728.

The previous prime is 276839. The next prime is 276847. The reversal of 276840 is 48672.

It can be written as a sum of positive squares in 2 ways, for example, as 272484 + 4356 = 522^2 + 66^2 .

It is not an unprimeable number, because it can be changed into a prime (276847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25 + ... + 744.

2²⁷⁶⁸⁴⁰ is an apocalyptic number.

276840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 276840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (450450).

276840 is an abundant number, since it is smaller than the sum of its proper divisors (624060).

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

276840 is a wasteful number, since it uses less digits than its factorization.

276840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 276840 is about 526.1558704415. The cubic root of 276840 is about 65.1742857184.

The spelling of 276840 in words is "two hundred seventy-six thousand, eight hundred forty".