16978272 has 24 divisors (see below), whose sum is σ = 44568216. Its totient is φ = 5659392.

The previous prime is 16978271. The next prime is 16978277. The reversal of 16978272 is 27287961.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16978271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88333 + ... + 88524.

It is an arithmetic number, because the mean of its divisors is an integer number (1857009).

Almost surely, 2^16978272 is an apocalyptic number.

16978272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16978272 is an abundant number, since it is smaller than the sum of its proper divisors (27589944).

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

16978272 is a wasteful number, since it uses less digits than its factorization.

16978272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176870 (or 176862 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 16978272 is about 4120.4698761185. The cubic root of 16978272 is about 257.0185656823.

The spelling of 16978272 in words is "sixteen million, nine hundred seventy-eight thousand, two hundred seventy-two".