2278144520 has 32 divisors (see below), whose sum is σ = 5234889600. Its totient is φ = 891868608.

The previous prime is 2278144471. The next prime is 2278144529. The reversal of 2278144520 is 254418722.

It is not an unprimeable number, because it can be changed into a prime (2278144529) 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, 604010 + ... + 607769.

It is an arithmetic number, because the mean of its divisors is an integer number (163590300).

Almost surely, 2^2278144520 is an apocalyptic number.

2278144520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2278144520 is an abundant number, since it is smaller than the sum of its proper divisors (2956745080).

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

2278144520 is a wasteful number, since it uses less digits than its factorization.

2278144520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211837 (or 1211833 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 35.

The square root of 2278144520 is about 47729.9122144594. The cubic root of 2278144520 is about 1315.8117403300.

The spelling of 2278144520 in words is "two billion, two hundred seventy-eight million, one hundred forty-four thousand, five hundred twenty".