989930 has 8 divisors (see below), whose sum is σ = 1781892. Its totient is φ = 395968.

The previous prime is 989929. The next prime is 989939. The reversal of 989930 is 39989.

It can be written as a sum of positive squares in 2 ways, for example, as 942841 + 47089 = 971^2 + 217^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×989930² = 1959922809800, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (989939) 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, 49487 + ... + 49506.

2⁹⁸⁹⁹³⁰ is an apocalyptic number.

989930 is a deficient number, since it is larger than the sum of its proper divisors (791962).

989930 is a wasteful number, since it uses less digits than its factorization.

989930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99000.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 989930 is about 994.9522601613. The cubic root of 989930 is about 99.6632002662.

The spelling of 989930 in words is "nine hundred eighty-nine thousand, nine hundred thirty".