16618472 has 16 divisors (see below), whose sum is σ = 33556740. Its totient is φ = 7670016.

The previous prime is 16618463. The next prime is 16618477. The reversal of 16618472 is 27481661.

It can be written as a sum of positive squares in 2 ways, for example, as 12013156 + 4605316 = 3466^2 + 2146^2 .

It is a super-2 number, since 2×16618472² = 552347223229568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16618477) 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, 79793 + ... + 80000.

Almost surely, 2^16618472 is an apocalyptic number.

It is an amenable number.

16618472 is an abundant number, since it is smaller than the sum of its proper divisors (16938268).

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

16618472 is a wasteful number, since it uses less digits than its factorization.

16618472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159812 (or 159808 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 16618472 is about 4076.5760142551. The cubic root of 16618472 is about 255.1900262412.

The spelling of 16618472 in words is "sixteen million, six hundred eighteen thousand, four hundred seventy-two".