2028861 has 16 divisors (see below), whose sum is σ = 3030720. Its totient is φ = 1341360.

The previous prime is 2028847. The next prime is 2028863. The reversal of 2028861 is 1688202.

It is not a de Polignac number, because 2028861 - 2¹¹ = 2026813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4171 + ... + 4631.

It is an arithmetic number, because the mean of its divisors is an integer number (189420).

2^2028861 is an apocalyptic number.

It is an amenable number.

2028861 is a deficient number, since it is larger than the sum of its proper divisors (1001859).

2028861 is a wasteful number, since it uses less digits than its factorization.

2028861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 2028861 is about 1424.3809181536. The cubic root of 2028861 is about 126.5952559935.

The spelling of 2028861 in words is "two million, twenty-eight thousand, eight hundred sixty-one".