989925616 has 40 divisors (see below), whose sum is σ = 1946661120. Its totient is φ = 487591104.

The previous prime is 989925571. The next prime is 989925749. The reversal of 989925616 is 616529989.

989925616 = T₂₅₆₈₈ + T₂₅₆₈₉ + T₂₅₆₉₀.

It is a happy number.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 1044855 + ... + 1045801.

It is an arithmetic number, because the mean of its divisors is an integer number (48666528).

Almost surely, 2^989925616 is an apocalyptic number.

989925616 is the 25690-th centered triangular number.

It is an amenable number.

989925616 is a deficient number, since it is larger than the sum of its proper divisors (956735504).

989925616 is a wasteful number, since it uses less digits than its factorization.

989925616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861 (or 1855 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 55.

The square root of 989925616 is about 31463.0833835465. The cubic root of 989925616 is about 996.6305314331.

The spelling of 989925616 in words is "nine hundred eighty-nine million, nine hundred twenty-five thousand, six hundred sixteen".