2028395931 has 4 divisors (see below), whose sum is σ = 2704527912. Its totient is φ = 1352263952.

The previous prime is 2028395927. The next prime is 2028395951. The reversal of 2028395931 is 1395938202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2028395931 - 2² = 2028395927 is a prime.

It is a super-2 number, since 2×2028395931² = 8228780105794713522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2028395951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338065986 + ... + 338065991.

It is an arithmetic number, because the mean of its divisors is an integer number (676131978).

Almost surely, 2^2028395931 is an apocalyptic number.

2028395931 is a deficient number, since it is larger than the sum of its proper divisors (676131981).

2028395931 is an equidigital number, since it uses as much as digits as its factorization.

2028395931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676131980.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 2028395931 is about 45037.7167605109. The cubic root of 2028395931 is about 1265.8558225235.

The spelling of 2028395931 in words is "two billion, twenty-eight million, three hundred ninety-five thousand, nine hundred thirty-one".