1982878867 has 4 divisors (see below), whose sum is σ = 1982991496. Its totient is φ = 1982766240.

The previous prime is 1982878847. The next prime is 1982878873. The reversal of 1982878867 is 7688782891.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1982878867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1982878799 and 1982878808.

It is not an unprimeable number, because it can be changed into a prime (1982878847) 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, 23553 + ... + 67234.

It is an arithmetic number, because the mean of its divisors is an integer number (495747874).

Almost surely, 2^1982878867 is an apocalyptic number.

1982878867 is a deficient number, since it is larger than the sum of its proper divisors (112629).

1982878867 is an equidigital number, since it uses as much as digits as its factorization.

1982878867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112628.

The product of its digits is 21676032, while the sum is 64.

The square root of 1982878867 is about 44529.5280347771. The cubic root of 1982878867 is about 1256.3155291610.

The spelling of 1982878867 in words is "one billion, nine hundred eighty-two million, eight hundred seventy-eight thousand, eight hundred sixty-seven".