16628297 has 8 divisors (see below), whose sum is σ = 19392000. Its totient is φ = 14252532.

The previous prime is 16628263. The next prime is 16628299. The reversal of 16628297 is 79282661.

It is not a de Polignac number, because 16628297 - 2⁶ = 16628233 is a prime.

It is a super-2 number, since 2×16628297² = 553000522240418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16628299) 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, 23897 + ... + 24582.

It is an arithmetic number, because the mean of its divisors is an integer number (2424000).

Almost surely, 2^16628297 is an apocalyptic number.

It is an amenable number.

16628297 is a deficient number, since it is larger than the sum of its proper divisors (2763703).

16628297 is an frugal number, since it uses more digits than its factorization.

16628297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48500 (or 48486 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 16628297 is about 4077.7808916125. The cubic root of 16628297 is about 255.2403065973.

The spelling of 16628297 in words is "sixteen million, six hundred twenty-eight thousand, two hundred ninety-seven".