971228440 has 64 divisors (see below), whose sum is σ = 2689565760. Its totient is φ = 307376640.

The previous prime is 971228417. The next prime is 971228507. The reversal of 971228440 is 44822179.

971228440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 971228440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129771 + ... + 137050.

It is an arithmetic number, because the mean of its divisors is an integer number (42024465).

Almost surely, 2^971228440 is an apocalyptic number.

It is an amenable number.

971228440 is an abundant number, since it is smaller than the sum of its proper divisors (1718337320).

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

971228440 is a wasteful number, since it uses less digits than its factorization.

971228440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266852 (or 266848 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 971228440 is about 31164.5381804384. The cubic root of 971228440 is about 990.3160029217.

The spelling of 971228440 in words is "nine hundred seventy-one million, two hundred twenty-eight thousand, four hundred forty".