989770 has 16 divisors (see below), whose sum is σ = 1843560. Its totient is φ = 382144.

The previous prime is 989761. The next prime is 989777. The reversal of 989770 is 77989.

989770 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 4 ways, for example, as 958441 + 31329 = 979^2 + 177^2 .

It is not an unprimeable number, because it can be changed into a prime (989777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1417 + ... + 1996.

2⁹⁸⁹⁷⁷⁰ is an apocalyptic number.

989770 is a deficient number, since it is larger than the sum of its proper divisors (853790).

989770 is a wasteful number, since it uses less digits than its factorization.

989770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 989770 is about 994.8718510441. The cubic root of 989770 is about 99.6578305360.

The spelling of 989770 in words is "nine hundred eighty-nine thousand, seven hundred seventy".