2028731881 has 8 divisors (see below), whose sum is σ = 2213872128. Its totient is φ = 1843710000.

The previous prime is 2028731879. The next prime is 2028731921. The reversal of 2028731881 is 1881378202.

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

It is not a de Polignac number, because 2028731881 - 2¹ = 2028731879 is a prime.

It is a super-2 number, since 2×2028731881² = 8231506089971596322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2028731281) 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, 8376 + ... + 64246.

It is an arithmetic number, because the mean of its divisors is an integer number (276734016).

Almost surely, 2^2028731881 is an apocalyptic number.

It is an amenable number.

2028731881 is a deficient number, since it is larger than the sum of its proper divisors (185140247).

2028731881 is a wasteful number, since it uses less digits than its factorization.

2028731881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59183.

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

The square root of 2028731881 is about 45041.4462578634. The cubic root of 2028731881 is about 1265.9257038160.

The spelling of 2028731881 in words is "two billion, twenty-eight million, seven hundred thirty-one thousand, eight hundred eighty-one".