828077889 has 4 divisors (see below), whose sum is σ = 1104103856. Its totient is φ = 552051924.

The previous prime is 828077869. The next prime is 828077911. The reversal of 828077889 is 988770828.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 828077889 - 2⁹ = 828077377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (828077839) 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, 138012979 + ... + 138012984.

It is an arithmetic number, because the mean of its divisors is an integer number (276025964).

Almost surely, 2^828077889 is an apocalyptic number.

It is an amenable number.

828077889 is a deficient number, since it is larger than the sum of its proper divisors (276025967).

828077889 is a wasteful number, since it uses less digits than its factorization.

828077889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276025966.

The product of its (nonzero) digits is 3612672, while the sum is 57.

The square root of 828077889 is about 28776.3425229823. The cubic root of 828077889 is about 939.0536306827.

The spelling of 828077889 in words is "eight hundred twenty-eight million, seventy-seven thousand, eight hundred eighty-nine".