16978445 has 16 divisors (see below), whose sum is σ = 22353408. Its totient is φ = 12277440.

The previous prime is 16978411. The next prime is 16978459. The reversal of 16978445 is 54487961.

It is not a de Polignac number, because 16978445 - 2¹⁰ = 16977421 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16978396 and 16978405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10052 + ... + 11618.

It is an arithmetic number, because the mean of its divisors is an integer number (1397088).

Almost surely, 2^16978445 is an apocalyptic number.

It is an amenable number.

16978445 is a deficient number, since it is larger than the sum of its proper divisors (5374963).

16978445 is a wasteful number, since it uses less digits than its factorization.

16978445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780.

The product of its digits is 241920, while the sum is 44.

The square root of 16978445 is about 4120.4908688165. The cubic root of 16978445 is about 257.0194386423.

The spelling of 16978445 in words is "sixteen million, nine hundred seventy-eight thousand, four hundred forty-five".