2801810128 has 20 divisors (see below), whose sum is σ = 5846085028. Its totient is φ = 1293143040.

The previous prime is 2801810117. The next prime is 2801810149. The reversal of 2801810128 is 8210181082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 723179664 + 2078630464 = 26892^2 + 45592^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2801810128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6734913 + ... + 6735328.

Almost surely, 2^2801810128 is an apocalyptic number.

It is an amenable number.

2801810128 is an abundant number, since it is smaller than the sum of its proper divisors (3044274900).

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

2801810128 is a wasteful number, since it uses less digits than its factorization.

2801810128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13470262 (or 13470256 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 31.

The square root of 2801810128 is about 52932.1275597345. The cubic root of 2801810128 is about 1409.7634074803.

The spelling of 2801810128 in words is "two billion, eight hundred one million, eight hundred ten thousand, one hundred twenty-eight".