16989970 has 32 divisors (see below), whose sum is σ = 32659200. Its totient is φ = 6341376.

The previous prime is 16989967. The next prime is 16989991. The reversal of 16989970 is 7998961.

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 15 ways as a sum of consecutive naturals, for example, 23271 + ... + 23989.

It is an arithmetic number, because the mean of its divisors is an integer number (1020600).

Almost surely, 2^16989970 is an apocalyptic number.

16989970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16989970 is a deficient number, since it is larger than the sum of its proper divisors (15669230).

16989970 is a wasteful number, since it uses less digits than its factorization.

16989970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 16989970 is about 4121.8891299985. The cubic root of 16989970 is about 257.0775805795.

The spelling of 16989970 in words is "sixteen million, nine hundred eighty-nine thousand, nine hundred seventy".