840276 has 36 divisors (see below), whose sum is σ = 2250612. Its totient is φ = 263424.

The previous prime is 840269. The next prime is 840277. The reversal of 840276 is 672048.

840276 = T₃₆ + T₃₇ + ... + T₁₇₁.

It can be written as a sum of positive squares in 2 ways, for example, as 767376 + 72900 = 876^2 + 270^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (27) 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 (840277) 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, 75 + ... + 1298.

It is an arithmetic number, because the mean of its divisors is an integer number (62517).

2⁸⁴⁰²⁷⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1125306).

840276 is an abundant number, since it is smaller than the sum of its proper divisors (1410336).

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

840276 is a wasteful number, since it uses less digits than its factorization.

840276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400 (or 1395 counting only the distinct ones).

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

The square root of 840276 is about 916.6656969692. The cubic root of 840276 is about 94.3642124711.

The spelling of 840276 in words is "eight hundred forty thousand, two hundred seventy-six".