998988970 has 96 divisors (see below), whose sum is σ = 2145242880. Its totient is φ = 333889920.

The previous prime is 998988953. The next prime is 998989007. The reversal of 998988970 is 79889899.

It is a happy number.

998988970 is a nontrivial binomial coefficient, being equal to C(395, 4).

It is a junction number, because it is equal to n+sod(n) for n = 998988896 and 998988905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5070912 + ... + 5071108.

It is an arithmetic number, because the mean of its divisors is an integer number (22346280).

Almost surely, 2^998988970 is an apocalyptic number.

998988970 is the 25807-th pentagonal number.

998988970 is an abundant number, since it is smaller than the sum of its proper divisors (1146253910).

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

998988970 is a wasteful number, since it uses less digits than its factorization.

998988970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 421 counting only the distinct ones).

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

The square root of 998988970 is about 31606.7867711984. The cubic root of 998988970 is about 999.6628763604.

The spelling of 998988970 in words is "nine hundred ninety-eight million, nine hundred eighty-eight thousand, nine hundred seventy".