2128986 has 12 divisors (see below), whose sum is σ = 4612842. Its totient is φ = 709656.

The previous prime is 2128963. The next prime is 2128991. The reversal of 2128986 is 6898212.

It can be written as a sum of positive squares in only one way, i.e., 2047761 + 81225 = 1431^2 + 285^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2128986.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59121 + ... + 59156.

2^2128986 is an apocalyptic number.

2128986 is an abundant number, since it is smaller than the sum of its proper divisors (2483856).

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

2128986 is a wasteful number, since it uses less digits than its factorization.

2128986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118285 (or 118282 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 2128986 is about 1459.1045199025. The cubic root of 2128986 is about 128.6444146449.

The spelling of 2128986 in words is "two million, one hundred twenty-eight thousand, nine hundred eighty-six".