276828021 has 12 divisors (see below), whose sum is σ = 402916800. Its totient is φ = 183142440.

The previous prime is 276828007. The next prime is 276828031. The reversal of 276828021 is 120828672.

It is a happy number.

It is not a de Polignac number, because 276828021 - 2⁵ = 276827989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276828031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116221 + ... + 118578.

It is an arithmetic number, because the mean of its divisors is an integer number (33576400).

Almost surely, 2^276828021 is an apocalyptic number.

It is an amenable number.

276828021 is a deficient number, since it is larger than the sum of its proper divisors (126088779).

276828021 is a wasteful number, since it uses less digits than its factorization.

276828021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234936 (or 234933 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 276828021 is about 16638.1495665834. The cubic root of 276828021 is about 651.7334566398.

The spelling of 276828021 in words is "two hundred seventy-six million, eight hundred twenty-eight thousand, twenty-one".