16988945 has 8 divisors (see below), whose sum is σ = 21459840. Its totient is φ = 12875760.

The previous prime is 16988941. The next prime is 16988947. The reversal of 16988945 is 54988961.

It is a happy number.

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

It is not a de Polignac number, because 16988945 - 2² = 16988941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16988893 and 16988902.

It is not an unprimeable number, because it can be changed into a prime (16988941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89321 + ... + 89510.

It is an arithmetic number, because the mean of its divisors is an integer number (2682480).

Almost surely, 2^16988945 is an apocalyptic number.

It is an amenable number.

16988945 is a deficient number, since it is larger than the sum of its proper divisors (4470895).

16988945 is a wasteful number, since it uses less digits than its factorization.

16988945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178855.

The product of its digits is 622080, while the sum is 50.

The square root of 16988945 is about 4121.7647919308. The cubic root of 16988945 is about 257.0724106700.

The spelling of 16988945 in words is "sixteen million, nine hundred eighty-eight thousand, nine hundred forty-five".