2177370828 has 48 divisors (see below), whose sum is σ = 5681035360. Its totient is φ = 721161792.

The previous prime is 2177370821. The next prime is 2177370841. The reversal of 2177370828 is 8280737712.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2177370821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47251 + ... + 81162.

Almost surely, 2^2177370828 is an apocalyptic number.

It is an amenable number.

2177370828 is an abundant number, since it is smaller than the sum of its proper divisors (3503664532).

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

2177370828 is a wasteful number, since it uses less digits than its factorization.

2177370828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128583 (or 128575 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The square root of 2177370828 is about 46662.3062867664. The cubic root of 2177370828 is about 1296.1167804576.

The spelling of 2177370828 in words is "two billion, one hundred seventy-seven million, three hundred seventy thousand, eight hundred twenty-eight".