2028678700921 has 8 divisors (see below), whose sum is σ = 2036453944320. Its totient is φ = 2020905189072.

The previous prime is 2028678700907. The next prime is 2028678700991. The reversal of 2028678700921 is 1290078768202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2028678700921 - 2³¹ = 2026531217273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2028678700991) 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, 1939656 + ... + 2796358.

It is an arithmetic number, because the mean of its divisors is an integer number (254556743040).

Almost surely, 2^{2028678700921} is an apocalyptic number.

It is an amenable number.

2028678700921 is a deficient number, since it is larger than the sum of its proper divisors (7775243399).

2028678700921 is an equidigital number, since it uses as much as digits as its factorization.

2028678700921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865775.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 2028678700921 in words is "two trillion, twenty-eight billion, six hundred seventy-eight million, seven hundred thousand, nine hundred twenty-one".