2028171975 has 24 divisors (see below), whose sum is σ = 3377737680. Its totient is φ = 1073790720.

The previous prime is 2028171973. The next prime is 2028171979. The reversal of 2028171975 is 5791718202.

It is not a de Polignac number, because 2028171975 - 2¹ = 2028171973 is a prime.

It is a super-2 number, since 2×2028171975² = 8226963120350801250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028171973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88420 + ... + 108969.

It is an arithmetic number, because the mean of its divisors is an integer number (140739070).

Almost surely, 2^2028171975 is an apocalyptic number.

2028171975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2028171975 is a deficient number, since it is larger than the sum of its proper divisors (1349565705).

2028171975 is a wasteful number, since it uses less digits than its factorization.

2028171975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197539 (or 197534 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 42.

The square root of 2028171975 is about 45035.2303757847. The cubic root of 2028171975 is about 1265.8092329275.

The spelling of 2028171975 in words is "two billion, twenty-eight million, one hundred seventy-one thousand, nine hundred seventy-five".