2128208877 has 32 divisors (see below), whose sum is σ = 3278755200. Its totient is φ = 1362686976.

The previous prime is 2128208861. The next prime is 2128208879. The reversal of 2128208877 is 7788028212.

It is not a de Polignac number, because 2128208877 - 2⁴ = 2128208861 is a prime.

It is a super-2 number, since 2×2128208877² = 9058546048283202258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128208879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144078 + ... + 158160.

It is an arithmetic number, because the mean of its divisors is an integer number (102461100).

Almost surely, 2^2128208877 is an apocalyptic number.

2128208877 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2128208877 is a deficient number, since it is larger than the sum of its proper divisors (1150546323).

2128208877 is a wasteful number, since it uses less digits than its factorization.

2128208877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14314 (or 14308 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 45.

The square root of 2128208877 is about 46132.5143147433. The cubic root of 2128208877 is about 1286.2876013453.

The spelling of 2128208877 in words is "two billion, one hundred twenty-eight million, two hundred eight thousand, eight hundred seventy-seven".