2028171388 has 6 divisors (see below), whose sum is σ = 3549299936. Its totient is φ = 1014085692.

The previous prime is 2028171377. The next prime is 2028171443. The reversal of 2028171388 is 8831718202.

It is a super-2 number, since 2×2028171388² = 8226958358203693088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2028171388.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253521420 + ... + 253521427.

Almost surely, 2^2028171388 is an apocalyptic number.

It is an amenable number.

2028171388 is a deficient number, since it is larger than the sum of its proper divisors (1521128548).

2028171388 is a wasteful number, since it uses less digits than its factorization.

2028171388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507042851 (or 507042849 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 2028171388 is about 45035.2238586642. The cubic root of 2028171388 is about 1265.8091108093.

The spelling of 2028171388 in words is "two billion, twenty-eight million, one hundred seventy-one thousand, three hundred eighty-eight".