869289890 has 24 divisors (see below), whose sum is σ = 1820187612. Its totient is φ = 298042080.

The previous prime is 869289823. The next prime is 869289901. The reversal of 869289890 is 98982968.

869289890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 800946601 + 68343289 = 28301^2 + 8267^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 886541 + ... + 887520.

Almost surely, 2^869289890 is an apocalyptic number.

869289890 is an abundant number, since it is smaller than the sum of its proper divisors (950897722).

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

869289890 is a wasteful number, since it uses less digits than its factorization.

869289890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774082 (or 1774075 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 59.

The square root of 869289890 is about 29483.7224583328. The cubic root of 869289890 is about 954.3804685894.

The spelling of 869289890 in words is "eight hundred sixty-nine million, two hundred eighty-nine thousand, eight hundred ninety".