2028166906840 has 32 divisors (see below), whose sum is σ = 4568194396080. Its totient is φ = 810410077312.

The previous prime is 2028166906789. The next prime is 2028166906847. The reversal of 2028166906840 is 486096618202.

It is a super-2 number, since 2×2028166906840² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028166906847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26733067 + ... + 26808826.

Almost surely, 2^{2028166906840} is an apocalyptic number.

2028166906840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2028166906840 is an abundant number, since it is smaller than the sum of its proper divisors (2540027489240).

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

2028166906840 is a wasteful number, since it uses less digits than its factorization.

2028166906840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53542851 (or 53542847 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 2028166906840 in words is "two trillion, twenty-eight billion, one hundred sixty-six million, nine hundred six thousand, eight hundred forty".