9972220 has 12 divisors (see below), whose sum is σ = 20941704. Its totient is φ = 3988880.

The previous prime is 9972199. The next prime is 9972233. The reversal of 9972220 is 222799.

9972220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249286 + ... + 249325.

It is an arithmetic number, because the mean of its divisors is an integer number (1745142).

Almost surely, 2^9972220 is an apocalyptic number.

It is an amenable number.

9972220 is an abundant number, since it is smaller than the sum of its proper divisors (10969484).

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

9972220 is a wasteful number, since it uses less digits than its factorization.

9972220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498620 (or 498618 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 9972220 is about 3157.8822017295. The cubic root of 9972220 is about 215.2437833276.

The spelling of 9972220 in words is "nine million, nine hundred seventy-two thousand, two hundred twenty".