989898970 has 16 divisors (see below), whose sum is σ = 1785369600. Its totient is φ = 395170384.

The previous prime is 989898941. The next prime is 989898983. The reversal of 989898970 is 79898989.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 989898896 and 989898905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93370 + ... + 103429.

It is an arithmetic number, because the mean of its divisors is an integer number (111585600).

Almost surely, 2^989898970 is an apocalyptic number.

989898970 is a deficient number, since it is larger than the sum of its proper divisors (795470630).

989898970 is a wasteful number, since it uses less digits than its factorization.

989898970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197309.

The product of its (nonzero) digits is 23514624, while the sum is 67.

The square root of 989898970 is about 31462.6599320528. The cubic root of 989898970 is about 996.6215891938.

The spelling of 989898970 in words is "nine hundred eighty-nine million, eight hundred ninety-eight thousand, nine hundred seventy".