16989930 has 48 divisors (see below), whose sum is σ = 44388864. Its totient is φ = 4508640.

The previous prime is 16989887. The next prime is 16989937. The reversal of 16989930 is 3998961.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16989937) 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 23 ways as a sum of consecutive naturals, for example, 27687 + ... + 28293.

It is an arithmetic number, because the mean of its divisors is an integer number (924768).

Almost surely, 2^16989930 is an apocalyptic number.

16989930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16989930 is an abundant number, since it is smaller than the sum of its proper divisors (27398934).

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

16989930 is a wasteful number, since it uses less digits than its factorization.

16989930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 16989930 is about 4121.8842778516. The cubic root of 16989930 is about 257.0773788308.

It can be divided in two parts, 1698 and 9930, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 16989930 in words is "sixteen million, nine hundred eighty-nine thousand, nine hundred thirty".