2128697988 has 24 divisors (see below), whose sum is σ = 4968021408. Its totient is φ = 709414656.

The previous prime is 2128697981. The next prime is 2128698017. The reversal of 2128697988 is 8897968212.

It is not an unprimeable number, because it can be changed into a prime (2128697981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49620 + ... + 81972.

It is an arithmetic number, because the mean of its divisors is an integer number (207000892).

Almost surely, 2^2128697988 is an apocalyptic number.

It is an amenable number.

2128697988 is an abundant number, since it is smaller than the sum of its proper divisors (2839323420).

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

2128697988 is a wasteful number, since it uses less digits than its factorization.

2128697988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37843 (or 37841 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 60.

The square root of 2128697988 is about 46137.8151628358. The cubic root of 2128697988 is about 1286.3861332190.

The spelling of 2128697988 in words is "two billion, one hundred twenty-eight million, six hundred ninety-seven thousand, nine hundred eighty-eight".