2828121287 has 4 divisors (see below), whose sum is σ = 2881482120. Its totient is φ = 2774760456.

The previous prime is 2828121229. The next prime is 2828121311. The reversal of 2828121287 is 7821218282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2828121287 - 2⁸ = 2828121031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2828121587) 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, 26680337 + ... + 26680442.

It is an arithmetic number, because the mean of its divisors is an integer number (720370530).

Almost surely, 2^2828121287 is an apocalyptic number.

2828121287 is a deficient number, since it is larger than the sum of its proper divisors (53360833).

2828121287 is an equidigital number, since it uses as much as digits as its factorization.

2828121287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53360832.

The product of its digits is 57344, while the sum is 41.

The square root of 2828121287 is about 53180.0835557824. The cubic root of 2828121287 is about 1414.1625875781.

The spelling of 2828121287 in words is "two billion, eight hundred twenty-eight million, one hundred twenty-one thousand, two hundred eighty-seven".