16989942 has 8 divisors (see below), whose sum is σ = 33979896. Its totient is φ = 5663312.

The previous prime is 16989941. The next prime is 16989943. The reversal of 16989942 is 24998961.

It is an interprime number because it is at equal distance from previous prime (16989941) and next prime (16989943).

It is a sphenic number, since it is the product of 3 distinct primes.

16989942 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 16989891 and 16989900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16989941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1415823 + ... + 1415834.

It is an arithmetic number, because the mean of its divisors is an integer number (4247487).

Almost surely, 2^16989942 is an apocalyptic number.

16989942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16989942 is a wasteful number, since it uses less digits than its factorization.

16989942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831662.

The product of its digits is 279936, while the sum is 48.

The square root of 16989942 is about 4121.8857334963. The cubic root of 16989942 is about 257.0774393554.

The spelling of 16989942 in words is "sixteen million, nine hundred eighty-nine thousand, nine hundred forty-two".