2128776 has 32 divisors (see below), whose sum is σ = 5732160. Its totient is φ = 654912.

The previous prime is 2128769. The next prime is 2128781. The reversal of 2128776 is 6778212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3100 + ... + 3723.

It is an arithmetic number, because the mean of its divisors is an integer number (179130).

2^2128776 is an apocalyptic number.

2128776 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2128776 is an abundant number, since it is smaller than the sum of its proper divisors (3603384).

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

2128776 is a wasteful number, since it uses less digits than its factorization.

2128776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6845 (or 6841 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 2128776 is about 1459.0325561823. The cubic root of 2128776 is about 128.6401847414.

It can be divided in two parts, 2 and 128776, that added together give a triangular number (128778 = T₅₀₇).

The spelling of 2128776 in words is "two million, one hundred twenty-eight thousand, seven hundred seventy-six".