2176640928 has 216 divisors, whose sum is σ = 7776516384. Its totient is φ = 565297920.

The previous prime is 2176640911. The next prime is 2176640929. The reversal of 2176640928 is 8290466712.

It is a happy number.

2176640928 is a `hidden beast` number, since 217 + 6 + 6 + 409 + 28 = 666.

It is a super-3 number, since 3×2176640928³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2176640929) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 239475 + ... + 248397.

Almost surely, 2^2176640928 is an apocalyptic number.

2176640928 is a gapful number since it is divisible by the number (28) 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 2176640928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3888258192).

2176640928 is an abundant number, since it is smaller than the sum of its proper divisors (5599875456).

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

2176640928 is a wasteful number, since it uses less digits than its factorization.

2176640928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8968 (or 8946 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 2176640928 is about 46654.4845432891. The cubic root of 2176640928 is about 1295.9719358349.

The spelling of 2176640928 in words is "two billion, one hundred seventy-six million, six hundred forty thousand, nine hundred twenty-eight".