2028684149 has 4 divisors (see below), whose sum is σ = 2040017760. Its totient is φ = 2017350540.

The previous prime is 2028684139. The next prime is 2028684191. The reversal of 2028684149 is 9414868202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9414868202 = 2 ⋅4707434101.

It is a cyclic number.

It is not a de Polignac number, because 2028684149 - 2²⁴ = 2011906933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028684139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5666537 + ... + 5666894.

It is an arithmetic number, because the mean of its divisors is an integer number (510004440).

Almost surely, 2^2028684149 is an apocalyptic number.

It is an amenable number.

2028684149 is a deficient number, since it is larger than the sum of its proper divisors (11333611).

2028684149 is a wasteful number, since it uses less digits than its factorization.

2028684149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11333610.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 2028684149 is about 45040.9163872140. The cubic root of 2028684149 is about 1265.9157755055.

The spelling of 2028684149 in words is "two billion, twenty-eight million, six hundred eighty-four thousand, one hundred forty-nine".