8172223488 has 660 divisors, whose sum is σ = 29371715208. Its totient is φ = 2242805760.

The previous prime is 8172223471. The next prime is 8172223529. The reversal of 8172223488 is 8843222718.

8172223488 is a `hidden beast` number, since 81 + 7 + 222 + 348 + 8 = 666.

It is a super-2 number, since 2×8172223488² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 154192870 + ... + 154192922.

Almost surely, 2^8172223488 is an apocalyptic number.

8172223488 is a gapful number since it is divisible by the number (88) 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 8172223488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14685857604).

8172223488 is an abundant number, since it is smaller than the sum of its proper divisors (21199491720).

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

8172223488 is a wasteful number, since it uses less digits than its factorization.

8172223488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 82 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 8172223488 is about 90400.3511497605. The cubic root of 8172223488 is about 2014.2501823390.

The spelling of 8172223488 in words is "eight billion, one hundred seventy-two million, two hundred twenty-three thousand, four hundred eighty-eight".