9172275840 has 1024 divisors, whose sum is σ = 42223104000. Its totient is φ = 1827422208.

The previous prime is 9172275779. The next prime is 9172275841. The reversal of 9172275840 is 485722719.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (9172275841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 29876967 + ... + 29877273.

It is an arithmetic number, because the mean of its divisors is an integer number (41233500).

Almost surely, 2^9172275840 is an apocalyptic number.

9172275840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9172275840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21111552000).

9172275840 is an abundant number, since it is smaller than the sum of its proper divisors (33050828160).

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

9172275840 is a wasteful number, since it uses less digits than its factorization.

9172275840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 9172275840 is about 95771.9992482145. Note that the first 3 decimals coincide. The cubic root of 9172275840 is about 2093.2721832471.

The spelling of 9172275840 in words is "nine billion, one hundred seventy-two million, two hundred seventy-five thousand, eight hundred forty".