2128778212 has 24 divisors (see below), whose sum is σ = 4104277632. Its totient is φ = 958044000.

The previous prime is 2128778209. The next prime is 2128778269.

2128778212 is nontrivially palindromic in base 10.

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, 235068 + ... + 243955.

It is an arithmetic number, because the mean of its divisors is an integer number (171011568).

Almost surely, 2^2128778212 is an apocalyptic number.

2128778212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2128778212 is a deficient number, since it is larger than the sum of its proper divisors (1975499420).

2128778212 is a wasteful number, since it uses less digits than its factorization.

2128778212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479139 (or 479137 counting only the distinct ones).

The product of its digits is 50176, while the sum is 40.

The square root of 2128778212 is about 46138.6845499522. The cubic root of 2128778212 is about 1286.4022929788.

It can be divided in two parts, 21287 and 78212, that added together give a palindrome (99499).

The spelling of 2128778212 in words is "two billion, one hundred twenty-eight million, seven hundred seventy-eight thousand, two hundred twelve".