9772420 has 72 divisors (see below), whose sum is σ = 24583104. Its totient is φ = 3196032.

The previous prime is 9772393. The next prime is 9772421. The reversal of 9772420 is 242779.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9772421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117699 + ... + 117781.

It is an arithmetic number, because the mean of its divisors is an integer number (341432).

Almost surely, 2^9772420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9772420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12291552).

9772420 is an abundant number, since it is smaller than the sum of its proper divisors (14810684).

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

9772420 is a wasteful number, since it uses less digits than its factorization.

9772420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 9772420 is about 3126.0870109452. The cubic root of 9772420 is about 213.7965574633.

The spelling of 9772420 in words is "nine million, seven hundred seventy-two thousand, four hundred twenty".