2809016028 has 72 divisors (see below), whose sum is σ = 8739171168. Its totient is φ = 740838528.

The previous prime is 2809016027. The next prime is 2809016039. The reversal of 2809016028 is 8206109082.

It is a super-4 number, since 4×2809016028⁴ (a number of 39 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2809015983 and 2809016001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2809016027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 425451 + ... + 432002.

Almost surely, 2^2809016028 is an apocalyptic number.

2809016028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2809016028 is an abundant number, since it is smaller than the sum of its proper divisors (5930155140).

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

2809016028 is a wasteful number, since it uses less digits than its factorization.

2809016028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857483 (or 857478 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 2809016028 is about 53000.1512073315. The cubic root of 2809016028 is about 1410.9709503672.

The spelling of 2809016028 in words is "two billion, eight hundred nine million, sixteen thousand, twenty-eight".