9997628 has 12 divisors (see below), whose sum is σ = 17534160. Its totient is φ = 4987872.

The previous prime is 9997627. The next prime is 9997643. The reversal of 9997628 is 8267999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9997621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473 + ... + 4496.

It is an arithmetic number, because the mean of its divisors is an integer number (1461180).

Almost surely, 2^9997628 is an apocalyptic number.

It is an amenable number.

9997628 is a deficient number, since it is larger than the sum of its proper divisors (7536532).

9997628 is a wasteful number, since it uses less digits than its factorization.

9997628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5476 (or 5474 counting only the distinct ones).

The product of its digits is 489888, while the sum is 50.

The square root of 9997628 is about 3161.9025917950. The cubic root of 9997628 is about 215.4264332592.

The spelling of 9997628 in words is "nine million, nine hundred ninety-seven thousand, six hundred twenty-eight".