16617472 has 26 divisors (see below), whose sum is σ = 33239078. Its totient is φ = 8306688.

The previous prime is 16617463. The next prime is 16617473. The reversal of 16617472 is 27471661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14258176 + 2359296 = 3776^2 + 1536^2 .

It is a super-2 number, since 2×16617472² = 552280751341568, which contains 22 as substring.

It is a nialpdrome in base 8 and base 16.

It is not an unprimeable number, because it can be changed into a prime (16617473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2068 + ... + 6124.

Almost surely, 2^16617472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16617472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16619539).

16617472 is an abundant number, since it is smaller than the sum of its proper divisors (16621606).

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

16617472 is an frugal number, since it uses more digits than its factorization.

16617472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081 (or 4059 counting only the distinct ones).

The product of its digits is 14112, while the sum is 34.

The square root of 16617472 is about 4076.4533604593. The cubic root of 16617472 is about 255.1849075367.

The spelling of 16617472 in words is "sixteen million, six hundred seventeen thousand, four hundred seventy-two".