2238778180 has 24 divisors (see below), whose sum is σ = 4702568472. Its totient is φ = 895295232.

The previous prime is 2238778169. The next prime is 2238778183. The reversal of 2238778180 is 818778322.

It can be written as a sum of positive squares in 4 ways, for example, as 27709696 + 2211068484 = 5264^2 + 47022^2 .

It is a super-2 number, since 2×2238778180² = 10024255478488224800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2238778180.

It is not an unprimeable number, because it can be changed into a prime (2238778183) 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, 91314 + ... + 113206.

It is an arithmetic number, because the mean of its divisors is an integer number (195940353).

Almost surely, 2^2238778180 is an apocalyptic number.

2238778180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2238778180 is an abundant number, since it is smaller than the sum of its proper divisors (2463790292).

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

2238778180 is a wasteful number, since it uses less digits than its factorization.

2238778180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27015 (or 27013 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 46.

The square root of 2238778180 is about 47315.7286745116. The cubic root of 2238778180 is about 1308.1885847228.

The spelling of 2238778180 in words is "two billion, two hundred thirty-eight million, seven hundred seventy-eight thousand, one hundred eighty".