2578028020 has 48 divisors (see below), whose sum is σ = 5657718528. Its totient is φ = 985783680.

The previous prime is 2578028009. The next prime is 2578028027. The reversal of 2578028020 is 208208752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578028027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8530 + ... + 72310.

It is an arithmetic number, because the mean of its divisors is an integer number (117869136).

Almost surely, 2^2578028020 is an apocalyptic number.

2578028020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2578028020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2828859264).

2578028020 is an abundant number, since it is smaller than the sum of its proper divisors (3079690508).

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

2578028020 is a wasteful number, since it uses less digits than its factorization.

2578028020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63880 (or 63878 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 2578028020 is about 50774.2850269701. The cubic root of 2578028020 is about 1371.1844446307.

The spelling of 2578028020 in words is "two billion, five hundred seventy-eight million, twenty-eight thousand, twenty".