2805278520 has 96 divisors (see below), whose sum is σ = 9250511760. Its totient is φ = 680064000.

The previous prime is 2805278459. The next prime is 2805278527. The reversal of 2805278520 is 258725082.

It is a happy number.

2805278520 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805278527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82081 + ... + 111120.

Almost surely, 2^2805278520 is an apocalyptic number.

2805278520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2805278520 is an abundant number, since it is smaller than the sum of its proper divisors (6445233240).

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

2805278520 is a wasteful number, since it uses less digits than its factorization.

2805278520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193237 (or 193222 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 2805278520 is about 52964.8800621695. The cubic root of 2805278520 is about 1410.3448882198.

The spelling of 2805278520 in words is "two billion, eight hundred five million, two hundred seventy-eight thousand, five hundred twenty".