989970020 has 24 divisors (see below), whose sum is σ = 2238855864. Its totient is φ = 365527296.

The previous prime is 989970019. The next prime is 989970029. The reversal of 989970020 is 20079989.

989970020 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 1999396 + 987970624 = 1414^2 + 31432^2 .

It is not an unprimeable number, because it can be changed into a prime (989970029) 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, 1903529 + ... + 1904048.

It is an arithmetic number, because the mean of its divisors is an integer number (93285661).

Almost surely, 2^989970020 is an apocalyptic number.

It is an amenable number.

989970020 is an abundant number, since it is smaller than the sum of its proper divisors (1248885844).

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

989970020 is a wasteful number, since it uses less digits than its factorization.

989970020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3807599 (or 3807597 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 989970020 is about 31463.7890280239. The cubic root of 989970020 is about 996.6454327953.

The spelling of 989970020 in words is "nine hundred eighty-nine million, nine hundred seventy thousand, twenty".