2028078100 has 18 divisors (see below), whose sum is σ = 4400929694. Its totient is φ = 811231200.

The previous prime is 2028078071. The next prime is 2028078103. The reversal of 2028078100 is 18708202.

It can be written as a sum of positive squares in 3 ways, for example, as 114190596 + 1913887504 = 10686^2 + 43748^2 .

It is a super-2 number, since 2×2028078100² = 8226201559399220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028078103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10140291 + ... + 10140490.

Almost surely, 2^2028078100 is an apocalyptic number.

2028078100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2028078100 is an abundant number, since it is smaller than the sum of its proper divisors (2372851594).

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

2028078100 is a wasteful number, since it uses less digits than its factorization.

2028078100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20280795 (or 20280788 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 2028078100 is about 45034.1881241352. The cubic root of 2028078100 is about 1265.7897030788.

The spelling of 2028078100 in words is "two billion, twenty-eight million, seventy-eight thousand, one hundred".