989951172 has 48 divisors (see below), whose sum is σ = 2689690752. Its totient is φ = 277505280.

The previous prime is 989951113. The next prime is 989951173. The reversal of 989951172 is 271159989.

It is not an unprimeable number, because it can be changed into a prime (989951173) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 106729 + ... + 115632.

It is an arithmetic number, because the mean of its divisors is an integer number (56035224).

Almost surely, 2^989951172 is an apocalyptic number.

It is an amenable number.

989951172 is an abundant number, since it is smaller than the sum of its proper divisors (1699739580).

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

989951172 is a wasteful number, since it uses less digits than its factorization.

989951172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222428 (or 222426 counting only the distinct ones).

The product of its digits is 408240, while the sum is 51.

The square root of 989951172 is about 31463.4895076818. The cubic root of 989951172 is about 996.6391077242.

The spelling of 989951172 in words is "nine hundred eighty-nine million, nine hundred fifty-one thousand, one hundred seventy-two".