276440 has 16 divisors (see below), whose sum is σ = 622080. Its totient is φ = 110560.

The previous prime is 276439. The next prime is 276443. The reversal of 276440 is 44672.

276440 = T₉₇ + T₉₈ + ... + T₁₃₆.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276443) 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, 3416 + ... + 3495.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2²⁷⁶⁴⁴⁰ is an apocalyptic number.

276440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

276440 is an abundant number, since it is smaller than the sum of its proper divisors (345640).

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

276440 is a wasteful number, since it uses less digits than its factorization.

276440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6922 (or 6918 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 276440 is about 525.7756175404. The cubic root of 276440 is about 65.1428809597.

The spelling of 276440 in words is "two hundred seventy-six thousand, four hundred forty".