989870256 has 60 divisors (see below), whose sum is σ = 2798860792. Its totient is φ = 326550528.

The previous prime is 989870249. The next prime is 989870267. The reversal of 989870256 is 652078989.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21466 + ... + 49401.

Almost surely, 2^989870256 is an apocalyptic number.

It is an amenable number.

989870256 is an abundant number, since it is smaller than the sum of its proper divisors (1808990536).

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

989870256 is a wasteful number, since it uses less digits than its factorization.

989870256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70978 (or 70969 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The square root of 989870256 is about 31462.2036100461. The cubic root of 989870256 is about 996.6119527663.

The spelling of 989870256 in words is "nine hundred eighty-nine million, eight hundred seventy thousand, two hundred fifty-six".