9997028 has 6 divisors (see below), whose sum is σ = 17494806. Its totient is φ = 4998512.

The previous prime is 9997007. The next prime is 9997033. The reversal of 9997028 is 8207999.

It can be written as a sum of positive squares in only one way, i.e., 9597604 + 399424 = 3098^2 + 632^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9997028.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1249625 + ... + 1249632.

It is an arithmetic number, because the mean of its divisors is an integer number (2915801).

Almost surely, 2^9997028 is an apocalyptic number.

It is an amenable number.

9997028 is a deficient number, since it is larger than the sum of its proper divisors (7497778).

9997028 is a wasteful number, since it uses less digits than its factorization.

9997028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2499261 (or 2499259 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 9997028 is about 3161.8077107882. The cubic root of 9997028 is about 215.4221236221.

The spelling of 9997028 in words is "nine million, nine hundred ninety-seven thousand, twenty-eight".