9972028 has 12 divisors (see below), whose sum is σ = 19037592. Its totient is φ = 4532720.

The previous prime is 9972023. The next prime is 9972029. The reversal of 9972028 is 8202799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9972023) 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, 113275 + ... + 113362.

It is an arithmetic number, because the mean of its divisors is an integer number (1586466).

Almost surely, 2^9972028 is an apocalyptic number.

It is an amenable number.

9972028 is a deficient number, since it is larger than the sum of its proper divisors (9065564).

9972028 is a wasteful number, since it uses less digits than its factorization.

9972028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226652 (or 226650 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 9972028 is about 3157.8518014625. The cubic root of 9972028 is about 215.2424019210.

It can be divided in two parts, 997 and 2028, that added together give a square (3025 = 55²).

The spelling of 9972028 in words is "nine million, nine hundred seventy-two thousand, twenty-eight".